| 单词 | loess |
| 例句 | Tracks of unknown creatures in the mortified loess. The Road 2006-09-28T00:00:00Z Fertile stuff, if it can somehow be irrigated, the loess blanketed the underlying structure like a heavy tarpaulin tossed over a piece of machinery. 1491 2005-10-10T00:00:00Z Almost twenty people were working on the Huaricanga mound, shoveling away the obscuring loess. 1491 2005-10-10T00:00:00Z Rising on the Tibetan plateau, it cuts a giant loop through the loess badlands of China’s north-west—the famous “yellow earth” formed of fine dust blown from the Gobi desert. Water, water, everywhere 2016-09-08T04:00:00Z This entry-level bottle is from vines grown on loess and loam on gentle slopes. 10 Reasons You Should Give Riesling Another Look 2020-06-18T04:00:00Z Eastern Colorado soils are 70% windblown loess, but cultivation, grazing, construction, and roads — anything that destabilizes the soil — can generate dust, says Kelly. Dust is a growing problem. What role does farmland play? 2022-01-25T05:00:00Z "Look, time is vertical," he would say, pointing to the strata of clay and loess. Herzog's Cave of Forgotten Dreams: the real art underground 2011-03-17T23:00:01Z The capital also used to be known for regular springtime dust and sandstorms caused by winds blowing in from the loess hills along the upper sections of the Yellow River to the west. Beijing air quality plummets amid dust storm, pollution 2023-03-10T05:00:00Z The caves carved from the loess hills where Mao Zedong and other party leaders road out World War II have since become a pilgrimage site for party faithful. A look at the 7 men slated to lead China’s Communist Party 2022-10-22T04:00:00Z The loess is so highly compacted that buildings and homes have been carved in it. An Introduction to Geology 2017-01-01T00:00:00Z Subsurface pressure and temperature effects cause changes in the composition and properties of rocks, and from these we reap flint, chert, loess, kaolin, granite and clay. Human evolution’s ties to tectonics 2019-01-22T05:00:00Z The only comparable deposits of loess are located in Shaanxi, China, according to the U.S. Loess Hills region earns coveted wine country designation 2016-06-25T04:00:00Z But sitting on top of that is a thick layer of loess, which is windblown dust from the deserts to the north. Afghan landslide was 'an accident waiting to happen' 2014-05-05T04:00:00Z The Pampas region retains a record of loess for the last 12 million years. Ancient life 'frozen' by space impact 2014-04-18T01:54:53Z As much of the mud is made of loess, a fine yellow sandy silt, the chance of finding survivors under the landslides is considered slim, state-run news agency Xinhua reported. Rescue as Gansu quake toll rises 2013-07-23T03:42:27Z Beyond this range the sand and clay loess formation spreads downwards like a tumbled sea, hiding within the folds of its many-crested hills the twisting course of the Kushk and its tributaries. Encyclopaedia Britannica, 11th Edition, Volume 13, Slice 3 "Helmont, Jean" to "Hernosand" 2012-04-14T02:00:23.707Z A layer of loess overlays the bedrock of the flat mesa tops in the Four Corners area. Comparative Ecology of Pinyon Mice and Deer Mice in Mesa Verde National Park, Colorado 2012-02-24T03:00:32.243Z These failures in loess tend to be really mobile, moving fast and for a long way. Afghan landslide was 'an accident waiting to happen' 2014-05-05T04:00:00Z The great plain itself is covered for the most part by loess and alluvium, but near its borders the Tertiary deposits rise to the surface. Encyclopaedia Britannica, 11th Edition, Volume 13, Slice 8 "Hudson River" to "Hurstmonceaux" 2012-02-24T03:00:27.173Z No river could drain the friable loess of Northwest China without bringing down great quantities of soil that would raise its bed and make it a menace in its lower, sluggish course. Our National Defense: The Patriotism of Peace 2011-12-14T03:00:16.577Z This occurrence of loess is the more noteworthy, since loess is rarely found in association with drift of the last glacial epoch. The Geography of the Region about Devils Lake and the Dalles of the Wisconsin 2011-11-29T03:00:17.347Z The evidence of boreal animals seems to disprove the hypothesis that the loess was formed in the middle of a mild inter-glacial epoch. Climatic Changes Their Nature and Causes 2011-10-28T02:00:24.840Z Then something strange happened: The loess in the terraces wasn’t on top of crushed rock anymore — it was on top of very finely laminated clay-rich sediments. Scientist at Work Blog: The Legend of Zhayi Zhaga 2011-08-16T17:54:32Z It was about a meter thick, buried by a meter of flow and on top of at least a meter of loess. Scientist at Work Blog: Faces and Artifacts at Old Zharu 2011-08-12T21:44:54Z When our University of Washington colleague met with some of our Chinese collaborators in Chengdu yesterday, he floated our ideas about a combination of loess flows and block faulting forming the local terraces. Scientist at Work Blog: All-Natural Terraces 2011-08-10T22:17:44Z Sitting on a colleague’s shoulders to collect grain size and color samples from higher up in the loess deposit. Scientist at Work: Soil Samples and Peanut Butter 2011-08-09T22:32:35Z The pebbles would be left behind as a pavement, while sand and then loess would be deposited farther from the ice where the winds were weaker and where vegetation was beginning to take root. Climatic Changes Their Nature and Causes 2011-10-28T02:00:24.840Z These deposits look suspiciously like some kind of lake or backwater channel deposits, but they are several hundred meters above the current valley floor and underneath loess deposits in terraces. Scientist at Work Blog: The Legend of Zhayi Zhaga 2011-08-16T17:54:32Z The layers of charcoal looked almost laminated in the loess and were interbedded with loess. Scientist at Work Blog: Faces and Artifacts at Old Zharu 2011-08-12T21:44:54Z Because loess fails at relatively low angles, it stuck to only the lowest-angle slopes — mainly landslide deposits or weak bedrock. Scientist at Work Blog: All-Natural Terraces 2011-08-10T22:17:44Z We need a few different kinds of samples: undisturbed loess and flow deposits, radiocarbon, optically stimulated luminescence, bags of sediment and snails. Scientist at Work: Digging Around for Snails 2011-08-04T18:39:43Z Such a decrease in wind velocity may explain the occasional vertical gradation from gravel through sand to coarse loess and then to normal fine loess. Climatic Changes Their Nature and Causes 2011-10-28T02:00:24.840Z Our goal was to document sedimentary deposits and to look for loess in them. Scientist at Work: River Sand in Bedrock 2011-08-04T11:48:01Z One of the highlights of the day was finding a cave that went a few meters back into the loess. Scientist at Work: Living Dangerously in Sichuan Province 2011-08-02T20:12:41Z For the stones to be supported by the loess, you really need some other process besides aeolian transport. Scientist at Work Blog: All-Natural Terraces 2011-08-10T22:17:44Z Similar but smaller samples will be sent to a colleague in Italy to see what the internal structure of the flows and loess is. Scientist at Work: Digging Around for Snails 2011-08-04T18:39:43Z As the ice continued to retreat the area where loess was deposited would follow at a distance, and thus each part of the gravel pavement would in turn be covered with the loess. Climatic Changes Their Nature and Causes 2011-10-28T02:00:24.840Z Faults may occur in rocks of all ages; small local dislocations are observable even in glacial deposits, alluvium and loess. Encyclopaedia Britannica, 11th Edition, Volume 10, Slice 2 "Fairbanks, Erastus" to "Fens" 2011-06-19T02:00:16.580Z In 1865, there was found in the loess of the Rhine, near Colmar, Alsace, human bones in the same bed with bones of the mammoth, horse, stag, auroch, and other animals. A Manual of the Antiquity of Man 2011-02-21T03:00:07.080Z Pampas of Argentina are generally covered by loess. Encyclopaedia Britannica, 11th Edition, Volume 2, Slice 5 "Arculf" to "Armour, Philip" The rains had washed the loess extensively, and I found a number of places where it lay redistributed, with a fairly smooth surface. Fossil Ice Crystals An Instance of the Practical Value of "Pure Science" This would favor the formation of loess, but it is In discussions of climate, as of most subjects, a peculiar psychological phenomenon is observable. Climatic Changes Their Nature and Causes 2011-10-28T02:00:24.840Z Wherever the light soil called loam, or “loess,” is found, it splits with a vertical cleavage, leaving high banks on each side of a rent in the earth. Village Life in China A Study in Sociology The upper twenty feet consisted of loess and the lower forty feet of stratified gravel. A Manual of the Antiquity of Man 2011-02-21T03:00:07.080Z It does not therefore strengthen Professor Nehring's view that Europe during the deposition of the loess had a climate comparable to that of the Siberian steppes. The History of the European Fauna At this time some excavations were being made in the loess in Rock Island, when some rains fell in the late fall. Fossil Ice Crystals An Instance of the Practical Value of "Pure Science" Thus at the height of a glacial epoch there would apparently be great storminess in the area where the loess is found, especially in summer. Climatic Changes Their Nature and Causes 2011-10-28T02:00:24.840Z Most of the black earth and some of the brown forest soils also have a high loess content, which tends to make them light, fine, and workable. Area Handbook for Romania The human skeleton from the undisturbed loess of the Rhine, near Lahr, was found in nearly a horizontal position, but in such a manner as to forbid the idea of sepulchre. A Manual of the Antiquity of Man 2011-02-21T03:00:07.080Z The Forest-Bed, generally regarded as belonging to the Upper Pliocene, I believe to be an inter-glacial pleistocene deposit—contemporaneous with the loess formation in Germany. The History of the European Fauna Away from the river, approaching the mountains, there is a broader area that is basically similar, but the subsoils are more porous and have allowed the humus and loess to leach downward from the surface. Area Handbook for Bulgaria Part of the loess overlies the non-glacial materials of the great central plain, but the northern portions overlie the drift deposits of the first three glaciations. Climatic Changes Their Nature and Causes 2011-10-28T02:00:24.840Z Wind-driven soil, gathered from the sides of bare hills and mountains, fills many valleys of China with a fine, hard-packed material called "loess." Earth and Sky Every Child Should Know Easy studies of the earth and the stars for any time and place These bones were exhumed from a perpendicular cliff of solid loess, about five feet high. A Manual of the Antiquity of Man 2011-02-21T03:00:07.080Z In many places whole villages live in cave dwellings dug out in the vertical wall of loess. Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 2 "Chicago, University of" to "Chiton" At their bases nestle mud-roofed cottages and Chinese inns, but farther up the river the low hills are all of loess—brown, wind-blown dust, packed hard, which can be cut like cheese. Across Mongolian Plains A Naturalist's Account of China's 'Great Northwest' The loess is thickest near the margin of the Iowan till sheet and thins progressively both north and south. Climatic Changes Their Nature and Causes 2011-10-28T02:00:24.840Z So compact is the loess that there is no danger of a cave-in. Earth and Sky Every Child Should Know Easy studies of the earth and the stars for any time and place In the alluvial plain into which the Schutter flows the the loess is two hundred feet thick. A Manual of the Antiquity of Man 2011-02-21T03:00:07.080Z The loess is a solid but friable earth of brownish-yellow colour, and when triturated with water is not unlike loam, but differs from the latter by its highly porous and tubular structure. Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 2 "Chicago, University of" to "Chiton" Once across the Hoang Ho and you enter the loess country, dear to the tiller of the soil, but the bane of the traveller, for the dust is often intolerable. A Wayfarer in China Impressions of a trip across West China and Mongolia It is now generally agreed that all typical loess is wind blown. Climatic Changes Their Nature and Causes 2011-10-28T02:00:24.840Z Owing to the friable nature of the soil formation known as loess, the traveller, whether journeying from north or south, finds himself in a succession of deep gullies. The Fulfilment of a Dream of Pastor Hsi's The Story of the Work in Hwochow The human bones found in the loess of the Rhine, near Colmar, were two fossilized fragments of the skull. A Manual of the Antiquity of Man 2011-02-21T03:00:07.080Z Wherever loess is found the Soils. peasant can live and thrive. Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 2 "Chicago, University of" to "Chiton" Now, that is coastal plain soil, and as you approach the Mississippi River here you have a covering of what the Germans call loess, fine, wind-blown material, silt loam. Northern Nut Growers Association Incorporated 39th Annual Report at Norris, Tenn. September 13-15 1948 We are now ready to consider the probability that loess accumulated mainly during the retreat of the ice. Climatic Changes Their Nature and Causes 2011-10-28T02:00:24.840Z Firstly we have the loess or firm sand, which can be cultivated; and secondly the disintegrated desert sand, which forms itself into heaps and causes sandstorms when the wind is high. Southern Arabia It would not take many centuries for mounds upon these sharp, exposed ridges to be entirely washed away, in spite of the fact that the fine loess is almost impermeable. Archeological Investigations Bureau of American Ethnology, Bulletin 76 Although the loess of the great plain and the sand of the desert are still in process of formation, the accumulation of these deposits probably began in the Tertiary period. Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 2 "Chicago, University of" to "Chiton" Wherever the rainfall is considerable these loess deposits have proved to have a high agricultural value. Outlines of the Earth's History A Popular Study in Physiography This suggests that the underlying till was eroded before the loess was deposited upon it. Climatic Changes Their Nature and Causes 2011-10-28T02:00:24.840Z Between the loess and the mould there was a layer from 3 to 6 inches in thickness, consisting of “cores, implements, flakes, and chips, all manufactured from hard basaltic rock.” A Book of Natural History Young Folks' Library Volume XIV. All of them are made of the same earth as that which lies around them—a light, sandy loess which is easily removed with a shovel, requiring no picking or other loosening. Archeological Investigations Bureau of American Ethnology, Bulletin 76 As, owing to the porous nature of loess, no artificial irrigation is possible, if the rain fails the crops must necessarily fail. Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 2 "Chicago, University of" to "Chiton" These ridges of limestone, loess and drift rise a hundred feet or more above the level of the plain from which the river suddenly turns aside. Some Winter Days in Iowa The fact that remains of trees sometimes occur at the bottom of the loess probably means that the deposition of loess extended into the forests which almost certainly persisted not far from the ice. Climatic Changes Their Nature and Causes 2011-10-28T02:00:24.840Z In the north is found the peculiar loess formation, having its origin probably in the accumulated dust of ages blown from the Mongolian plateau. Myths and Legends of China The soil is ordinary sandy loess, containing lime but not in such quantity as to account for this alteration. Archeological Investigations Bureau of American Ethnology, Bulletin 76 The loess soil is extremely favourable to agriculture. Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 2 "Chicago, University of" to "Chiton" There is an important field for which definite provision has not yet been made, namely, the study of the loess that constitutes the bluff formations of the Mississippi River and its tributaries. Scientific American Supplement, No. 484, April 11, 1885 The conditions would be almost ideal for eolian erosion and for the transportation of loess by the wind to areas a little more remote from the ice where grassy vegetation had made a start. Climatic Changes Their Nature and Causes 2011-10-28T02:00:24.840Z Roads here were in many cases of a light loess, and some of red limestone rock, with a few li of paved roads. Across China on Foot They were washed in when the loess was deposited, as claimed by the discoverers and by some of the Nebraska geologists. Archeological Investigations Bureau of American Ethnology, Bulletin 76 The loess, which in Shen-si has settled like a pall over the country, is here absent, and red sandstone rocks, filling the valleys between the high-bounding and intermediate ridges of palaeozoic formation, take its place. The Travels of Marco Polo — Volume 2 But as this loess proves to be intimately associated with the glacial formations of the same region, it is probable that it will eventually be relegated to the glacial division. Scientific American Supplement, No. 484, April 11, 1885 The famous loess deposits of China in the lee of the Desert of Gobi are examples. Climatic Changes Their Nature and Causes 2011-10-28T02:00:24.840Z Many of the main roads over the loess are altered by the rains. Across China on Foot A wagon road up the point, from the river bottom to the hilltop, shows undisturbed loess the entire distance. Archeological Investigations Bureau of American Ethnology, Bulletin 76 During this period the gradual desiccation of the country continued, and wind-blown deposits, such as the loess, began to make their appearance. The Project Gutenberg Encyclopedia Volume 1 of 28 In the loess plains there could not have been any stone whatever for building purposes, and there is little, if any, specific mention of brick. Ancient China Simplified During the Pleistocene period, however, loess accumulated in a broad zone along the margin of the ice sheet at its maximum extent. Climatic Changes Their Nature and Causes 2011-10-28T02:00:24.840Z This rested upon the unchanged and undisturbed loess of the bluffs, which formed the floor of the pit. An Introduction to the mortuary customs of the North American Indians Knowing that it had no place in the loess, he began digging to ascertain the reason for it being there. Archeological Investigations Bureau of American Ethnology, Bulletin 76 The loess in Belgium is variable in thickness, usually ranging from 10 to 30 feet. The Antiquity of Man The soil is a yellow silty soil, resembling loess in texture, underlaid by a clay subsoil with layers or pockets of sand. The Story of the Soil; from the Basis of Absolute Science and Real Life, Hence arises the hypothesis that the wind obtained the loess from the flood plains of streams at times of maximum glaciation. Climatic Changes Their Nature and Causes 2011-10-28T02:00:24.840Z Much of the loess was deposited in Iowan times. The Elements of Geology The claim is made that human bones were found at a depth of 14 feet in absolutely undisturbed loess. Archeological Investigations Bureau of American Ethnology, Bulletin 76 This pachyderm and Rhinoceros tichorhinus are cited as characterising the loess in various parts of the valley of the Rhine. The Antiquity of Man In some parts of the valley of the Rhine the accumulation of similar loam, called in Germany "loess," has taken place on an enormous scale. The Student's Elements of Geology Turning to the second hypothesis, namely, that the loess accumulated near the close of the inter-glacial epoch rather than in the midst of it, we may follow Penck. Climatic Changes Their Nature and Causes 2011-10-28T02:00:24.840Z A yellow earth, quite like the loess of China, is laid broadly as a surface deposit over the Mississippi valley from eastern Nebraska to Ohio outside the boundaries of the Iowan and the Wisconsin drift. The Elements of Geology Between the loess and the mould there was a layer from 3 to 6 inches in thickness, consisting of "cores, implements, flakes, and chips, all manufactured from hard basaltic rock." The formation of vegetable mould through the action of worms, with observations on their habits Several perfect skeletons of the marmot have been disinterred from the loess of Aix-la-Chapelle. The Antiquity of Man These dirt-cliffs, or "loess," to give them their scientific name, are remarkable banks of brownish-yellow loam, found largely in Northern and Western China, and rising sometimes to a height of a thousand feet. Historic Girls Near the Alps where the loess deposits are small and where glaciers probably persisted in the inter-glacial epochs and thus supplied flood plain material in large quantities, this does not appear important. Climatic Changes Their Nature and Causes 2011-10-28T02:00:24.840Z In part the loess seems to have been washed from glacial waste and spread in sluggish glacial waters, and in part to have been distributed by the wind from plains of aggrading glacial streams. The Elements of Geology The gravel pavement discussed below seems to be strong evidence of erosion between the retreat of the ice and the deposition of the loess. Climatic Changes Their Nature and Causes 2011-10-28T02:00:24.840Z It has been reported of late years that human remains have been detected at several points in the loess of the Meuse around and below Maestricht. The Antiquity of Man The mammalian fossils seem to him to prove that the loess was formed while boreal animals occupied the region, for they include remains of the hairy mammoth, woolly rhinoceros, and reindeer. Climatic Changes Their Nature and Causes 2011-10-28T02:00:24.840Z Another reason for questioning whether the loess was formed at the end of an inter-glacial epoch is that this hypothesis does not provide a reasonable origin for the material which composes the loess. Climatic Changes Their Nature and Causes 2011-10-28T02:00:24.840Z On loess hillsides in China are thousands of villages whose eavelike dwellings have been excavated in this soft, yet firm, dry loam. The Elements of Geology On the other hand, Penck's hypothesis as to loess at the end of inter-glacial times fails to account for certain characteristics of the lowest part of the loess deposits and of the underlying topography. Climatic Changes Their Nature and Causes 2011-10-28T02:00:24.840Z This section occurs at the village of Smeermass, and is about 60 feet deep, the lower 40 feet consisting of stratified gravel and the upper of 20 feet of loess. The Antiquity of Man Some of these can be seen in exposed banks, while many more are inferred from the presence of shells of pond snails here and there in the overlying loess. Climatic Changes Their Nature and Causes 2011-10-28T02:00:24.840Z Several other lines of evidence seemingly support the conclusion that the loess was formed during the retreat of the ice. Climatic Changes Their Nature and Causes 2011-10-28T02:00:24.840Z One of the most remarkable formations associated with glacial deposits consists of vast sheets of the fine-grained, yellowish, wind-blown material called loess. Climatic Changes Their Nature and Causes 2011-10-28T02:00:24.840Z Indeed, loess is lacking in the western and drier parts of the great plains and is best developed in the well-watered states of Iowa, Illinois, and Missouri. Climatic Changes Their Nature and Causes 2011-10-28T02:00:24.840Z They were of an age long posterior to that of the loess containing the bones of elephants and in which the human jaw now at Leyden is said to have been embedded. The Antiquity of Man Also the distribution of loess along the margins of streams suggests that much of the material came from the flood plains of overloaded streams flowing from the melting ice. Climatic Changes Their Nature and Causes 2011-10-28T02:00:24.840Z For example, Shimek, who has made almost a lifelong study of the Iowan loess, emphasizes the fact that there is often an accumulation of stones and pebbles at its base. Climatic Changes Their Nature and Causes 2011-10-28T02:00:24.840Z The roots and stalks of such grassy vegetation are generally agreed to have helped produce the columnar structure which enables the loess to stand with almost vertical surfaces. Climatic Changes Their Nature and Causes 2011-10-28T02:00:24.840Z The closeness with which the cyclonic hypothesis accords with the facts as to the loess is one of the pleasant surprises of the hypothesis. Climatic Changes Their Nature and Causes 2011-10-28T02:00:24.840Z Strictly speaking it must be placed much farther north, or in the 51st parallel of latitude, where the limits of the loess have been traced out by MM. The Antiquity of Man Several American and European students have thought that the loess dates from inter-glacial times. Climatic Changes Their Nature and Causes 2011-10-28T02:00:24.840Z So widespread a sheet of gravel could not be deposited by streams without destroying the irregular basins and hollows of which we have seen evidence where the loess lies on glacial deposits. Climatic Changes Their Nature and Causes 2011-10-28T02:00:24.840Z For example, abundant shells of land snails in the loess are not of the sort now found in colder regions, but resemble those found in the drier regions. Climatic Changes Their Nature and Causes 2011-10-28T02:00:24.840Z Instead of normal valleys and consequent prompt drainage such as ought to have developed before the end of a long inter-glacial epoch, the surface on which the loess lies shows many undrained depressions. Climatic Changes Their Nature and Causes 2011-10-28T02:00:24.840Z If we ascend the basin of the Neckar, we find that it is filled with loess of great thickness, far above its junction with the Rhine. The Antiquity of Man The mineralogical character of the loess of Iowan age proves that the material came from granitic rocks, such as formed a large part of the drift. Climatic Changes Their Nature and Causes 2011-10-28T02:00:24.840Z The hypothesis that loess is deposited while the ice is retreating is in accord with many other lines of evidence. Climatic Changes Their Nature and Causes 2011-10-28T02:00:24.840Z The vegetation there is quite different from the grassy, semi-arid vegetation of which evidence is found in the loess. Climatic Changes Their Nature and Causes 2011-10-28T02:00:24.840Z Yet so far as can now be seen, both agree closely with the conditions of loess formation. Climatic Changes Their Nature and Causes 2011-10-28T02:00:24.840Z At this place the loess is covered by a thick bed of travertine, used as a building stone, the product of a mineral spring. The Antiquity of Man Then in Chapter IX we shall consider the development and distribution of the remarkable deposits of wind-blown material known as loess. Climatic Changes Their Nature and Causes 2011-10-28T02:00:24.840Z Hence the cyclonic hypothesis does not accord with the idea of great deposition of loess at the time of maximum glaciation. Climatic Changes Their Nature and Causes 2011-10-28T02:00:24.840Z A terrace of gravel covered with loess has been mentioned as existing on the right bank of the Meuse at Maestricht. The Antiquity of Man Over the gravel above mentioned, near Chauny, are seen dense masses of loam like the loess of the Rhine, containing shells of the genera Helix and Succinea. The Antiquity of Man This mud of the plains of Egypt, according to Professor Bischoff's chemical analysis agrees closely in composition with the loess of the Rhine.* The Antiquity of Man If, therefore, the relative ages of the Picardy and Natchez alluvium were to be decided on conchological data alone, the fluvio-marine beds of Abbeville might rank as a shade older than the loess of Natchez. The Antiquity of Man The cyclonic hypothesis also seems to offer a satisfactory explanation of variations in the amount of loess associated with the several glacial epochs. Climatic Changes Their Nature and Causes 2011-10-28T02:00:24.840Z Calcareous loam, buff-coloured, resembling loess, for the most part unstratified, in some places with slight traces of stratification, containing freshwater and land shells, with bones of elephants, etc.; thickness about 15 feet. The Antiquity of Man A theory, therefore, which attempts to account for the position of the loess cannot be satisfactory unless it be equally applicable to the basins of the Rhine and Danube. The Antiquity of Man The loess of Belgium was called "Hesbayan mud" in the geological map of the late M. Dumont, who, I am told, recognised it as being in great part composed of Alpine mud. The Antiquity of Man This plain is composed of modern loess, undistinguishable in mineral character from that of higher antiquity, before alluded to, and entirely without signs of successive deposition and devoid of terrestrial or fluviatile shells. The Antiquity of Man For example, they would explain such puzzling conditions as the localization and periodicity of glaciation, the formation of loess, and the occurrence of glaciation in low latitudes during Permian and Proterozoic times. Climatic Changes Their Nature and Causes 2011-10-28T02:00:24.840Z The table-land in that region, composed of Carboniferous and Devonian rocks, is about 450 feet high, and is not overspread with loess. The Antiquity of Man At Canstadt near Stuttgart, loess resembling that of the Rhine contains many fossil bones, especially those of Elephas primigenius, together with some of Rhinoceros tichorhinus, the species having been lately determined by Dr. Falconer. The Antiquity of Man We may therefore be sure that the valley bounded by steep hills of granite existed before the tranquil accumulation of this vast body of loess. The Antiquity of Man In these instances it does not appear to me that the volcanoes were in eruption during the time of the deposition of the loess, as some geologists have supposed. The Antiquity of Man These four hypotheses as to the time of origin of loess imply the following differences in its climatic relations. Climatic Changes Their Nature and Causes 2011-10-28T02:00:24.840Z The bluffs before alluded to often consist of a terrace of gravel, from 30 to 40 feet in thickness, covered by an older loess, which is continuous as we ascend the valley to Liege. The Antiquity of Man In the suburbs of that city patches of loess are seen at the height of 200 feet above the level of the Meuse. The Antiquity of Man |
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