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Showing results for tags 'late pleistocene'.
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From the album: MY FOSSIL Collection - Dpaul7
Mammoth Tooth - Mammuthus columbi SITE LOCATION: West Point, Cumings County, Nebraska TIME PERIOD: Late Pleistocene - (About 25 thousand years old) Data: The Columbian mammoth (Mammuthus columbi) is an extinct species of mammoth that inhabited North America as far north as the northern United States and as far south as Costa Rica during the Pleistocene epoch. It was one of the last in a line of mammoth species, beginning with M. subplanifrons in the early Pliocene. The Columbian mammoth evolved from the steppe mammoth, which entered North America from Asia about 1.5 million years ago. The pygmy mammoths of the Channel Islands of California evolved from Columbian mammoths. The closest extant relative of the Columbian and other mammoths is the Asian elephant. Columbian mammoths had four functional molar teeth at a time, two in the upper jaw and two in the lower. About 23 cm (9.1 in) of the crown was within the jaw, and 2.5 cm (1 in) was above. The crown was pushed forward and up as it wore down, comparable to a conveyor belt. The teeth had separated ridges of enamel, which were covered in "prisms" directed towards the chewing surface. Wear-resistant, they were held together with cementum and dentin. A mammoth's molars were replaced five times over the animal's lifetime. The first molars were about the size of those of a human, 1.3 cm (0.51 in); the third were 15 cm (5.9 in) long, and the sixth were about 30 cm (1 ft) long and weighed 1.8 kg (4 lb). With each replacement, the molars grew larger and gained more ridges; the number of plates varied between individuals. Kingdom: Animalia Phylum: Chordata Class: Mammalia Order: Proboscidea Family: Elephantidae Genus: †Mammuthus Species: †columbi -
From the album: MY FOSSIL Collection - Dpaul7
Mammoth Tooth - Mammuthus columbi SITE LOCATION: West Point, Cumings County, Nebraska TIME PERIOD: Late Pleistocene - (About 25 thousand years old) Data: The Columbian mammoth (Mammuthus columbi) is an extinct species of mammoth that inhabited North America as far north as the northern United States and as far south as Costa Rica during the Pleistocene epoch. It was one of the last in a line of mammoth species, beginning with M. subplanifrons in the early Pliocene. The Columbian mammoth evolved from the steppe mammoth, which entered North America from Asia about 1.5 million years ago. The pygmy mammoths of the Channel Islands of California evolved from Columbian mammoths. The closest extant relative of the Columbian and other mammoths is the Asian elephant. Columbian mammoths had four functional molar teeth at a time, two in the upper jaw and two in the lower. About 23 cm (9.1 in) of the crown was within the jaw, and 2.5 cm (1 in) was above. The crown was pushed forward and up as it wore down, comparable to a conveyor belt. The teeth had separated ridges of enamel, which were covered in "prisms" directed towards the chewing surface. Wear-resistant, they were held together with cementum and dentin. A mammoth's molars were replaced five times over the animal's lifetime. The first molars were about the size of those of a human, 1.3 cm (0.51 in); the third were 15 cm (5.9 in) long, and the sixth were about 30 cm (1 ft) long and weighed 1.8 kg (4 lb). With each replacement, the molars grew larger and gained more ridges; the number of plates varied between individuals. Kingdom: Animalia Phylum: Chordata Class: Mammalia Order: Proboscidea Family: Elephantidae Genus: †Mammuthus Species: †columbi -
Collected this just now...
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Fossil Coral Reefs Show Late Pleistocene Sea Level Rose in Bursts
Oxytropidoceras posted a topic in Fossil News
Fossil coral reefs show sea level rose in bursts during last warming Reefs near Texas endured punctuated bursts of sea-level rise before drowning, Jade Boyd, Rice university, October 19, 2017 http://news.rice.edu/2017/10/19/fossil-coral-reefs-show-sea-level-rose-in-bursts-during-last-warming-2/ https://www.sciencedaily.com/releases/2017/10/171019100954.htm Pankaj Khanna, André W. Droxler, Jeffrey A. Nittrouer, John W. Tunnell Jr, Thomas C. Shirley. Coralgal reef morphology records punctuated sea-level rise during the last deglaciation. Nature Communications, 2017; 8 (1) DOI: 10.1038/s41467-017-00966-x https://www.nature.com/articles/s41467-017-00966-x Yours, Paul H.- 1 reply
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Dear Guys, I recently found some bones that are difficult to me to identify- possible mammoth rib proximal end, rhino zugoma and unidentified radius bone in Late Pleistocene sand layers of Varena Town, South Lithuania (it is Eastern Europe). The width of mammoth rib proximal end is 6,2 cm in the articular part, the bone layer in the cross section is massive. The length of possible rhino zygomatic bone is 5,6 cm and it has specific texture in the skull surface near eye. It is also massive and I see that thickness of bone is about 1,5 cm. The partial radius is 10,2 cm length and 3 cm width in the lower articular part. Any idea what this should be? Best Regards Domas
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Dear Guys, Today I found very interesting and also simply looking tusk fragment in Varena town (South Lithuania) near my home. Its length is 8,3 cm and it has thick bone layer in the both ends. It is almost straight and by appearance of piece I see that it was long and sharp. The age of fossil is Late Pleistocene, the last glaciation times. Any idea what is this? Best Regards Domas
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Dear Guys, Today I found two premolars that are too sharp to Bison in my opinion, so I think they should belong to camel. They are found in Varena town, South Lithuania (it is Eastern Europe). The bigger tooth is 2,4 cm width, smaller is 1,9 cm width. Any idea what is this? Best Regards Domas
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Dear Guys, Yesterday I found one big calcaneus bone, I think it should be carnivore because the big joint is located in the side. It should not be an ungulate. It could be the most similar to cat or dog but I think dogs did not have so large calcaneus- my find is 10,5 cm length. Any idea what is this? Best Regards Domas
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Dear Guys, I recently noticed the surprising similarity between two calcaneus bones I found in the same forest felling in South Lithuania. I think they belong to deers but the first in the picture is very big (8,3 cm length) and second is small (6,3 cm length). Is it possible that larger bone belong to Irish Elk? The latest fossils of this animal found in Siberia, they are 8000 years old. Best Regards Domas
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Dear Guys, I have found the first phalanx bone of artiodactyl in the same forest felling as two calcaneum bones similar to deer. The wild ox and big deer phalanges are very similar but it would be great to know which animal it is. The size of first phalange is 5,3 cm length so it should be small wild ox or big deer (e.g. Irish Elk). Any idea what is this? Best Regards Domas
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Dear Guys, I have found one thick phalange but I cannot decide what animal it is. Very similar appearance have mammoth but also horse distal phalange. The width is 6 cm. Any idea what is this? Best Regards Domas
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Dear Guys, I have found one very specific bone fragment which is very hard to me to identify, it is from Late Pleistocene sand layers of Varena town, South Lithuania. The wider part of bone has very strange joint relief and I do not know which animal is this. Please help with ID of this fossil. Best Regards Domas
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Antelope metapodial and calcaneum from Late Pleistocene
D.N.FossilmanLithuania posted a topic in Fossil ID
Dear Guys, I have two possible bones of antelopes, they are very small to ungulates. I found these two bones in the Late Pleistocene sand layers of Varena town, South Lithuania. The calcaneum is only 4 cm length, metapodial- 10,5 cm length. The confirmation of these fossils would be very helpful to my further articles. Any idea what is this? Best Regards Domas
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Dear Guys, I have found one very thin and long (15,5 cm length) tibia and in my opinion it should be too small to ungulate. The wider end has very oblong and thin cross section, I think it could belong to rabbit but I have doubt because the lower joint in rabbit tibias does not look very similar. Any idea which mammal bone is this? Best Regards Domas
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Dear Guys, Today I found very small (3,1 cm length) sharp bone, by me it should be phalange of claw and by the appearance I think it should be something like badger. The age is Late Pleistocene, it is from sand layers of South Lithuania. Any idea what is this? Best Regards Domas
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Dear Guys, I have found very interesting and big radius bone which should belong to large ungulate. It is bigger than simple cow, I think. Talking about bisons in my area (Lithuania, Eastern Europe) the largest was Bison priscus. The age of bone is 10-13 thousand years judging by in situ sand rocks in my town. The size of bone is 18 cm in length and it is much wider in the articular part. Any idea what is this? Best Regards Domas
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Dear Guys, Today I found one very interesting piece of bone, I think it is humerus of big carnivorous mammal like hyena. The size of bone is 10,3 cm length and 6,5 cm in the articular part. If it would be Cave hyena, it would be very rare find, my country belongs to Baltic States, Eastern Europe. The age of sand layers in my area is about 10- 13 thousand years. Please help with ID Best Regards Domas
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I just picked this up in Galveston Bay dredge spoils. It's late Pleistocene. I've not found anything quite like it before. This particular spot has yielded a number of mammoth teeth but no mastodon although others have. This is the occlusal surface.
