| 单词 | Oligocene |
| 例句 | It represents a segment of a population tracing its ancestry back to the widespread Oligocene ancestor, approximately 28 million years ago, in the Philippines. Researchers discover a new species of larger benthic foraminifer from the Ryukyu Islands 2023-09-19T04:00:00Z The report includes an understated, but nonetheless pointed, criticism of the paltriness of scientific literature about North Pacific odontocetes species from the Oligocene epoch, which lasted roughly from 33.7 to 23.8 million years ago. Ancient dolphin cousins with odd teeth hint at echolocation evolution 2023-06-24T04:00:00Z As the Eocene gave way to the Oligocene, tectonic forces dealt a final blow to Gondwana, cleaving apart Australia, South America and Antarctica. No One Knows How the Biggest Animals on Earth—Baleen Whales—Find Their Food 2023-03-14T04:00:00Z Glaciers first appeared on Antarctica in the Oligocene and then on Greenland in the Miocene, and covered much of North America and Europe by the Pleistocene. Physical Geology 2015-01-01T00:00:00Z Based on the location and age of the rocks surrounding the ant hills, the researchers estimate that the fossils are from the late Eocene and early Oligocene epochs. They Uncover New Fossils, but They Also Bite 2022-07-01T04:00:00Z The fossil dates to the late Oligocene epoch and is believed to be 24 million to 28 million years old. Rare fossil of ancient dog species discovered 2022-05-03T04:00:00Z "However, given their importance, most of these have yet to be properly described, and our understanding of species richness and relationships between Oligocene odontocetes from the North Pacific is not fully understood," the authors write. Ancient dolphin cousins with odd teeth hint at echolocation evolution 2023-06-24T04:00:00Z The slow-moving extinction event took place as the Eocene epoch switched to the Oligocene. Global extinction 30 million years ago also hit mammals in Africa, Arabian peninsula 2021-11-05T04:00:00Z The find dates from the Oligocene period, when the local climate would have been a rainforest rather than dry outback. Australian researchers uncover fossil of new eagle species 2021-09-28T04:00:00Z "There are many other unique and strange early dolphins and baleen whales from Oligocene aged rocks in Charleston, South Carolina," Boessenecker explained. Prehistoric 15-foot dolphin acted like modern-day killer whales, researchers say 2020-07-10T04:00:00Z Patricia’s time is Oligocene time, from 23 million to more than 30 million years before present. The Meaning of Time in the Place where Humanity's Earliest Ancestors Arose 2020-06-27T04:00:00Z The fossil whale in question was found in the 1970s in Oregon and dates to between 33 million and 32 million years ago, during the early Oligocene period. Toothless whale fossil fills gap in filter-feeding evolution 2018-10-17T04:00:00Z But, Peredo says, the transition likely was complete by the end of the Oligocene, about 23 million years ago. How ancient whales lost their teeth—and turned into the world’s biggest living filters 2018-10-18T04:00:00Z The early fossil record of the group is poor, with the oldest specimen being from the Late Oligocene of Australia. Pigeons and Doves 101 2018-04-08T04:00:00Z Ospreys as a whole must be quite old: there are Miocene species of Pandion and Oligocene remains of indeterminate forms. Raptors Once More (Raptors, Part 2) 2018-01-21T05:00:00Z This other Wakaleo species is just about as old, going back to the Late Oligocene, and points to an even earlier origin for the group. Paleo Profile: Shouten's Marsupial Lion 2017-12-16T05:00:00Z By studying the fossilized remains of the animal's teeth, skull, and humerus, the researchers determined the 50-pound climber roamed rainforests about 18 to 26 million years ago, during the late Oligocene and early Miocene eras. New Species of Dog-Size Marsupial Lion Discovered 2017-12-07T05:00:00Z "The Oligocene represents one of the most important periods of whale evolution," Boessenecker and colleagues write, documenting an underwater evolutionary boom of different whale lineages. Paleo Profile: The Strange, Defenseless Snout 2017-09-17T04:00:00Z Robert Boessenecker, a paleontologist at the College of Charleston who authored the paper on the fossil, says many similar fossils are being found at the Oligocene Ashley Formation of South Carolina. New Species of Prehistoric Dolphin Slurped Up Its Prey 2017-08-23T04:00:00Z Taraschelon – an Oligocene form from France – reached c 80 cm in carapace length. Letters From the World of Turtle Evolution 2017-08-20T04:00:00Z Whatever Oligocene treasures the land may hold — other than the inconsequential ones in Sena’s hand — will be beyond reach. When Calif. builders dig, paleontologists are there to bag the fossils — even whales 2017-03-10T05:00:00Z In this exciting study of the Oligocene age skull - reconstructed digitally by an international team from CT-scans - palaeontologists have challenged the idea of a baleen and tooth transitional stage in ancient whales. How did the whale get its “moustache”? | Elsa Panciroli 2016-11-29T05:00:00Z To this day, no other place on earth is known to be as rich in fossils of Oligocene mammals. Fossil History attracts paleontologists in South Dakota 2016-10-03T04:00:00Z This evolutionary divergence happened within the Oligocene Epoch, one of the most important periods of whale evolution, during the Paleogene Period. New Species of Prehistoric Dolphin Slurped Up Its Prey 2017-08-23T04:00:00Z A few Eocene and Oligocene nests suggested to be those of ducks have been mentioned or illustrated but not described in any detail. Bird behaviour, the ‘deep time’ perspective 2014-01-27T12:35:26Z This dating places the discovery in the Oligocene epoch, which extends from about 34 million to 23 million years ago. Fossils Indicate Common Ancestor for Old World Monkeys and Apes 2013-05-16T16:45:00.373Z These are certainly not the only fossil squamate eggs – there are gekkotan eggs from the Cretaceous of Spain, India, Mongolia and the USA, the Miocene of Kenya, Oligocene of Germany and elsewhere. A drowned nesting colony of Late Cretaceous birds 2012-05-15T16:15:03.013Z The reconstruction shows that the Kairuku penguin was easily the largest of the five species that were common to New Zealand during the Oligocene time period. Big NZ fossil penguin reconstructed 2012-02-28T01:44:57Z Several forms occur in the Oligocene and Miocene beds of Europe. Encyclopaedia Britannica, 11th Edition, Volume 7, Slice 8 "Cube" to "Daguerre, Louis" 2012-01-31T03:00:17.257Z The shells which have been found in them indicate that they belong for the most part to the Oligocene period. Encyclopaedia Britannica, 11th Edition, Volume 7, Slice 7 "Crocoite" to "Cuba" 2012-01-22T03:00:24.397Z Previous geological evidence gathered by the team suggests that tectonic activity in the East African rift system during the late Oligocene may have helped to trigger the evolutionary divergence between Old World monkeys and apes. Fossils Indicate Common Ancestor for Old World Monkeys and Apes 2013-05-16T16:45:00.373Z The Eocene system is unknown in Germany except in the foothills of the Alps; but the Oligocene and Miocene are widely spread, especially in the great plain and in the depression of the Danube. Encyclopaedia Britannica, 11th Edition, Volume 11, Slice 7 "Geoponici" to "Germany" 2011-09-26T02:00:25.313Z The Eocene beds are arranged in two groups, termed the Lower and Upper Eocene; the strata formerly called Upper Eocene being now known as Oligocene. The New Gresham Encyclopedia Volume 4, Part 2: Ebert to Estremadura 2011-04-14T02:00:56.200Z Nearly allied is the American Mesohippus, ranging from the Lower Miocene to the Lower Oligocene of the United States, of which the earliest species stood only about 18 in. at the shoulder. Encyclopaedia Britannica, 11th Edition, Volume 9, Slice 7 "Equation" to "Ethics" 2011-02-27T03:00:31.973Z The latter, like the similar deposits in other West Indian islands, is probably of Oligocene age. Encyclopaedia Britannica, 11th Edition, Volume 7, Slice 7 "Crocoite" to "Cuba" 2012-01-22T03:00:24.397Z “Before the discoveries from Rukwa, only three primate genera had been described from all of the late Oligocene, globally,” says Stevens. Fossils Indicate Common Ancestor for Old World Monkeys and Apes 2013-05-16T16:45:00.373Z The Oligocene division has been generally accepted as a distinct period, but “Paleocene” is not so widely used. Encyclopaedia Britannica, 11th Edition, Volume 9, Slice 6 "English Language" to "Epsom Salts" 2011-02-19T03:00:59.807Z In the opinion of Dr F. Ameghino these Oligocene armadillos, which had bony shields on both the head and body, were near akin to some of the modern South American forms. Encyclopaedia Britannica, 11th Edition, Volume 8, Slice 10 "Echinoderma" to "Edward" 2011-01-19T03:00:19.027Z In the early Oligocene, fish existed that were similar in size and shape to the modern prey of today's pelicans. Prehistoric pelican had big beak 2010-06-11T08:27:00Z Cretaceous limestones and serpentine take a large part in the formation of these mountains, while even the Oligocene is involved in the folds. Encyclopaedia Britannica, 11th Edition, Volume 2, Slice 7 "Arundel, Thomas" to "Athens" Many fossils from the late Oligocene are teeth, so it is common to use them for species identification. Fossils Indicate Common Ancestor for Old World Monkeys and Apes 2013-05-16T16:45:00.373Z The genus has a very wide distribution, extending from Europe through Asia to North America, and occurring in strata which are of Oligocene and Miocene age. Encyclopaedia Britannica, 11th Edition, Volume 2, Slice 6 "Armour Plates" to "Arundel, Earls of" No noteworthy fossil spiders are known; the best-preserved are in amber of Oligocene age. Encyclopaedia Britannica, 11th Edition, Volume 2, Slice 3 "Apollodorus" to "Aral" The Oligocene strata often vary considerably within short distances. The Geological Story of the Isle of Wight A new species of heteromyid rodent from the Middle Oligocene of northeastern Colorado with remarks on the skull. Myology and Serology of the Avian Family Fringillidae A Taxonomic Study During the upper Oligocene time very nearly the whole island was undoubtedly submerged. The History of Cuba, vol. 1 Oligocene and Eocene time Pliocene and Miocene time. Unexplored! The Tertiary system includes conglomerates, sandstones, limestones and marls, which appear to be of Eocene, Oligocene and Miocene age. Encyclopaedia Britannica, 11th Edition, Volume 4, Slice 3 "Borgia, Lucrezia" to "Bradford, John" Large numbers are found in the Oligocene strata. The Geological Story of the Isle of Wight The lower, of Eocene and Oligocene age, consists generally of sand and clays which were evidently laid down near a shore line. Encyclopaedia Britannica, 11th Edition, Volume 5, Slice 6 "Celtes, Konrad" to "Ceramics" It is probable that the folding of the Oligocene strata noted in the vicinity of Havana and Matanzas took place during this time. The History of Cuba, vol. 1 Remains of several of the existing genera have been found in Oligocene and later beds of Europe, Sumatra and North America. Encyclopaedia Britannica, 11th Edition, Volume 5, Slice 4 "Carnegie Andrew" to "Casus Belli" O. Heer, who examined the numerous plant remains from these beds, concluded that they belonged to the same geological horizon as the Molasse or Oligocene of Switzerland. Encyclopaedia Britannica, 11th Edition, Volume 4, Slice 3 "Borgia, Lucrezia" to "Bradford, John" Last of the Oligocene in the Isle of Wight are the Hamstead beds. The Geological Story of the Isle of Wight Remains of centipedes closely related to existing forms have been recorded from Oligocene beds. Encyclopaedia Britannica, 11th Edition, Volume 5, Slice 6 "Celtes, Konrad" to "Ceramics" It is furthermore very probable that the terracing of the Oligocene coral reefs, such as may be seen in the vicinity of the city of Santiago, was taking place during that time. The History of Cuba, vol. 1 Again, in the Hampshire Basin and Isle of Wight, Eocene and Oligocene formations rest upon the Chalk. Encyclopaedia Britannica, 11th Edition, Volume 9, Slice 4 "England" to "English Finance" The fluvio-marine deposits of the Upper Eocene and Oligocene formations contain an interesting mammalian fauna, proving that the African continent formed a centre of radiation for the mammalia in early Tertiary times. Encyclopaedia Britannica, 11th Edition, Volume 9, Slice 1 "Edwardes" to "Ehrenbreitstein" The fauna and flora of the Oligocene strata show that the climate was still sub-tropical, though somewhat cooling down from the Eocene. The Geological Story of the Isle of Wight It is probable that folding took place at more than one geological epoch, and the whole series of beds up to the Oligocene is involved in the folds. Encyclopaedia Britannica, 11th Edition, Volume 5, Slice 6 "Celtes, Konrad" to "Ceramics" Mountain building in Oriente had begun before the deposition of upper Oligocene strata, and the Sierra Maestra had already been elevated to a considerable height above the sea. The History of Cuba, vol. 1 Some of the Oligocene forms, alike as regards dentition, the union of the scaphoid and lunar of the carpus, and the complexity of the brain, approximated to modern Carnivora. Encyclopaedia Britannica, 11th Edition, Volume 7, Slice 6 "Coucy-le-Château" to "Crocodile" A new species of the rodent Pipestoneomys from the Oligocene of Nebraska. Records of the Fossil Mammal Sinclairella, Family Apatemyidae, From the Chadronian and Orellan Specially interesting in the Eocene and Oligocene are the mammalian remains. The Geological Story of the Isle of Wight There is a lacustrine group which has usually been placed in the Lower Eocene, but the discovery of Anthracotherium magnum in the interbedded lignites proves it to be Oligocene, in part at least. Encyclopaedia Britannica, 11th Edition, Volume 3, Part 1, Slice 2 "Baconthorpe" to "Bankruptcy" It may be added here that all of the elevated Pleistocene coral reefs recorded are plastered on the surface of the upper Oligocene formations, or in some instances older geologic rocks. The History of Cuba, vol. 1 It is these latter forms which come nearest to modern Carnivora, most of them being of Oligocene age. Encyclopaedia Britannica, 11th Edition, Volume 7, Slice 6 "Coucy-le-Château" to "Crocodile" A revision of the American Apatemyidae and the description of a new genus, Sinclairella, from the White River Oligocene of South Dakota. Records of the Fossil Mammal Sinclairella, Family Apatemyidae, From the Chadronian and Orellan We followed the alternations of sea and land, and the changing life of Eocene and Oligocene times. The Geological Story of the Isle of Wight The Oligocene cats, thirty million years ago, were already highly specialized, and the habits and physical characteristics of cats have been fixed since then. It’s like this, cat If afternoon teas had been started in the Oligocene Epoch instead of the seventeenth century, we are convinced that evolution, far from discarding this useful appendage, would have perfected it. The Perfect Gentleman Mesonyx is also a very distinct type, from the North American Eocene and Oligocene. Encyclopaedia Britannica, 11th Edition, Volume 7, Slice 6 "Coucy-le-Château" to "Crocodile" During the Oligocene the elevation of the land continued, the climate became much less moist, and the grazing herds extended their range. The Outline of Science, Vol. 1 (of 4) A Plain Story Simply Told After this sketch of what went before our Island story, we must see what followed at the end of the Oligocene period. The Geological Story of the Isle of Wight The Eocene, or older Tertiary, further appears with nummulitic formations on both sides of the eastern Balkans; the Oligocene only near the Black Sea coast at Burgas. Encyclopaedia Britannica, 11th Edition, Volume 4, Part 4 "Bulgaria" to "Calgary" In the case of the Alps, to which we wish now specially to refer, the chief upheaval appears to have been in Oligocene times, although movement continued to the close of the Pliocene. The Birth-Time of the World and Other Scientific Essays In Europe and North America they date from the Lowest Eocene and lived till the early Oligocene, while in India they apparently survived till a much later epoch. Encyclopaedia Britannica, 11th Edition, Volume 7, Slice 6 "Coucy-le-Château" to "Crocodile" The tapir is a very archaic type of ungulate, not unlike the non- specialized beasts of the Oligocene. Through the Brazilian Wilderness For our soft Oligocene strata, if exposed to rain and river action during the long Miocene period and the time which followed, would surely have been entirely swept away. The Geological Story of the Isle of Wight Geologically they are known to date back to the Oligocene period, and wings believed to be referable to them have been found in Liassic and Jurassic beds. Encyclopaedia Britannica, 11th Edition, Volume 4, Part 4 "Bulgaria" to "Calgary" That you and I exist today must be due to the preparedness of some shaggy anthropoid of the Oligocene. Jungle Tales of Tarzan It is subdivided into four sections—the Eocene, Oligocene, Miocene, and Pliocene. The Evolution of Man — Volume 2 This differs chiefly from Lyell's classification in the introduction of the term Oligocene for the upper part of the original Eocene, which was somewhat unwieldy. The Antiquity of Man Our latest Oligocene strata are tilted with the chalk, showing that the upheaval took place after Oligocene times. The Geological Story of the Isle of Wight Professor Beyrich confines the term "Miocene" to those strata which agree in age with the faluns of Touraine, and he has proposed the term "Oligocene" for those older formations called Lower Miocene in this work. The Student's Elements of Geology The Mesozoic era has three periods, the Triassic, Jurassic and Cretaceous, while the Cenozoic era names five periods,—the Eocene, Oligocene, Miocene, Pliocene and Pleistocene. The Grand Canyon of Arizona; how to see it The first sub-family is the entirely extinct group of Hyracodonts, which may be traced in successive modifications through the upper Eocene, lower and middle Oligocene, then disappearing altogether. Darwin and Modern Science The Tertiary Era is divided by geologists into four periods: the Eocene, Oligocene, Miocene, and Pliocene. The Story of Evolution The Oligocene only occur in the Hampshire basin, the higher strata only in the Isle of Wight. The Geological Story of the Isle of Wight From the lower Eocene to the lower sub-stage of the middle Oligocene the series is complete, beginning with small and rather lightly built animals. Darwin and Modern Science Some members of this group extended their range to the Old World, but they all died out in the middle Oligocene, leaving no successors. Darwin and Modern Science Each one of the different Eocene and Oligocene horizons has its characteristic genus of horses, showing a slow, steady progress in a definite direction, all parts of the structure participating in the advance. Darwin and Modern Science But the advance is, as I said, suspended, and the Oligocene period maintains the golden age. The Story of Evolution We pass on to strata which used to be called Upper Eocene, but are now generally classified as a period by themselves, and called the Oligocene. The Geological Story of the Isle of Wight Representatives of this sub-family continue through the Oligocene and Miocene of North America, becoming rare and localised in the Pliocene and then disappearing altogether. Darwin and Modern Science In the succeeding geological period, the Oligocene, we find several horse-types in which the adaptation of the limbs to running on the firm grassy plains and of the teeth to eating the grass continues. The Story of Evolution The genus Mesohippus, of the middle Oligocene, may be selected as a kind of half-way stage in the long progression. Darwin and Modern Science Amber is the resin that exuded from pine-like trees, especially in the Baltic region, in the Eocene and Oligocene periods. The Story of Evolution In the Oligocene it spreads into three great branches, adapted, respectively, to life on the elevated lands, the lowlands, and the water. The Story of Evolution Chevrotains flourished in Europe and North America in the Oligocene, and are still very primitive in structure, combining features of the hog and the ruminants. The Story of Evolution In the Oligocene we find primitive squirrels, beavers, rabbits, and mice. The Story of Evolution Apparently related to the horses and derived from the same root-stock is the family of the Palaeotheres, confined to the Eocene and Oligocene of Europe, dying out without descendants. Darwin and Modern Science We find a number of strange patriarchal beasts entering the scene in the early Eocene, and spreading into a great variety of forms in the genial conditions of the Oligocene and Miocene. The Story of Evolution Continental authorities even refer some of them to the Miocene and the last part of the Oligocene. The Story of Evolution The geniality of the Oligocene period was due, like that of the earlier warm periods, to the low-lying land and very extensive water-surface. The Story of Evolution |
| 随便看 |
英语例句辞典收录了117811条英语例句在线翻译词条，基本涵盖了全部常用单词及词组的例句翻译及用法，是英语学习的有利工具。