Dinosaurs on the North Slope, Alaska: High Latitude, Latest Cretaceous Environments
Abundant skeletal remains demonstrate that lambeosaurine hadrosaurid, tyrannosaurid, and troodontid dinosaurs lived on the Alaskan North Slope during late Campanian—early Maestrichtian time (about 66 to 76 million years ago) in a deltaic environment dominated by herbaceous vegetation. The high groun...
Published in: | Science |
---|---|
Main Authors: | , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
American Association for the Advancement of Science (AAAS)
1987
|
Subjects: | |
Online Access: | http://dx.doi.org/10.1126/science.237.4822.1608 https://www.science.org/doi/pdf/10.1126/science.237.4822.1608 |
id |
craaas:10.1126/science.237.4822.1608 |
---|---|
record_format |
openpolar |
spelling |
craaas:10.1126/science.237.4822.1608 2024-09-15T18:25:03+00:00 Dinosaurs on the North Slope, Alaska: High Latitude, Latest Cretaceous Environments Brouwers, Elisabeth M. Clemens, William A. Spicer, Robert A. Ager, Thomas A. Carter, L. David Sliter, William V. 1987 http://dx.doi.org/10.1126/science.237.4822.1608 https://www.science.org/doi/pdf/10.1126/science.237.4822.1608 en eng American Association for the Advancement of Science (AAAS) Science volume 237, issue 4822, page 1608-1610 ISSN 0036-8075 1095-9203 journal-article 1987 craaas https://doi.org/10.1126/science.237.4822.1608 2024-08-01T04:01:18Z Abundant skeletal remains demonstrate that lambeosaurine hadrosaurid, tyrannosaurid, and troodontid dinosaurs lived on the Alaskan North Slope during late Campanian—early Maestrichtian time (about 66 to 76 million years ago) in a deltaic environment dominated by herbaceous vegetation. The high ground terrestrial plant community was a mild- to cold-temperate forest composed of coniferous and broad leaf trees. The high paleolatitude (about 70° to 85° North) implies extreme seasonal variation in solar insolation, temperature, and herbivore food supply. Great distances of migration to contemporaneous evergreen floras and the presence of both juvenile and adult hadrosaurs suggest that they remained at high latitudes year-round. This challenges the hypothesis that short-term periods of darkness and temperature decrease resulting from a bolide impact caused dinosaurian extinction. Article in Journal/Newspaper north slope Alaska AAAS Resource Center (American Association for the Advancement of Science) Science 237 4822 1608 1610 |
institution |
Open Polar |
collection |
AAAS Resource Center (American Association for the Advancement of Science) |
op_collection_id |
craaas |
language |
English |
description |
Abundant skeletal remains demonstrate that lambeosaurine hadrosaurid, tyrannosaurid, and troodontid dinosaurs lived on the Alaskan North Slope during late Campanian—early Maestrichtian time (about 66 to 76 million years ago) in a deltaic environment dominated by herbaceous vegetation. The high ground terrestrial plant community was a mild- to cold-temperate forest composed of coniferous and broad leaf trees. The high paleolatitude (about 70° to 85° North) implies extreme seasonal variation in solar insolation, temperature, and herbivore food supply. Great distances of migration to contemporaneous evergreen floras and the presence of both juvenile and adult hadrosaurs suggest that they remained at high latitudes year-round. This challenges the hypothesis that short-term periods of darkness and temperature decrease resulting from a bolide impact caused dinosaurian extinction. |
format |
Article in Journal/Newspaper |
author |
Brouwers, Elisabeth M. Clemens, William A. Spicer, Robert A. Ager, Thomas A. Carter, L. David Sliter, William V. |
spellingShingle |
Brouwers, Elisabeth M. Clemens, William A. Spicer, Robert A. Ager, Thomas A. Carter, L. David Sliter, William V. Dinosaurs on the North Slope, Alaska: High Latitude, Latest Cretaceous Environments |
author_facet |
Brouwers, Elisabeth M. Clemens, William A. Spicer, Robert A. Ager, Thomas A. Carter, L. David Sliter, William V. |
author_sort |
Brouwers, Elisabeth M. |
title |
Dinosaurs on the North Slope, Alaska: High Latitude, Latest Cretaceous Environments |
title_short |
Dinosaurs on the North Slope, Alaska: High Latitude, Latest Cretaceous Environments |
title_full |
Dinosaurs on the North Slope, Alaska: High Latitude, Latest Cretaceous Environments |
title_fullStr |
Dinosaurs on the North Slope, Alaska: High Latitude, Latest Cretaceous Environments |
title_full_unstemmed |
Dinosaurs on the North Slope, Alaska: High Latitude, Latest Cretaceous Environments |
title_sort |
dinosaurs on the north slope, alaska: high latitude, latest cretaceous environments |
publisher |
American Association for the Advancement of Science (AAAS) |
publishDate |
1987 |
url |
http://dx.doi.org/10.1126/science.237.4822.1608 https://www.science.org/doi/pdf/10.1126/science.237.4822.1608 |
genre |
north slope Alaska |
genre_facet |
north slope Alaska |
op_source |
Science volume 237, issue 4822, page 1608-1610 ISSN 0036-8075 1095-9203 |
op_doi |
https://doi.org/10.1126/science.237.4822.1608 |
container_title |
Science |
container_volume |
237 |
container_issue |
4822 |
container_start_page |
1608 |
op_container_end_page |
1610 |
_version_ |
1810465463848665088 |