By Anthony D. Barnosky
This booklet chronicles the invention and research of animal fossils present in the most vital paleontological websites within the world-Porcupine Cave, positioned at an elevation of 9,500 toes within the Colorado Rocky Mountains. With tens of hundreds of thousands of pointed out specimens, this web site has turn into the foremost resource of knowledge at the fauna of North America's greater elevations among nearly 1 million and 600,000 years in the past, a interval that observed the development and retreat of glaciers various occasions. before, little has been understood approximately how this dramatic weather switch affected lifestyles throughout the heart Pleistocene. as well as featuring cutting-edge facts from Porcupine Cave, this research additionally provides groundbreaking research on what the knowledge from the location express in regards to the evolutionary and ecological alterations that happened during this interval, laying off gentle on how one of many world's such a lot urgent environmental concerns-global weather change-can impact existence on the earth. Illustrations: fifty eight b/w images, seventy six line illustrations, fifty seven tables
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Extra info for Biodiversity Response to Climate Change in the Middle Pleistocene: The Porcupine Cave Fauna from Colorado
Unlike higher-elevation portions of the Front and Mosquito ranges, the Tarryalls do not contain extensive highlands, and valley glaciers did not form there during the Pleistocene. 3 Looking southwest across the northern portion of South Park toward the Mosquito Range. In the foreground the abundant light-colored low plants are fringed sage, with blue grama grass. The darker areas on the valley floor in the distance are wetlands dominated by arctic rush. Conifer forests dominate the lower portions of the distant mountains, and alpine tundra occurs on the higher mountains.
3, Site 8) LO C AL IT Y N U M B E R DMNH 1348. 18 ANTHONY D. BARNOSKY ET AL. The taphonomy of the site has not been studied in detail. However, the physical setting is near the top of the current hill, with bones derived from a vertically oriented, unstratified, poorly sorted lens composed of a jumble of sediment and rocks with diameters ranging from less than 1 cm to more than 20 cm in diameter. The preponderance of small bones and fragments coupled with the abundance of bone in the sediment (this is one of the richest localities in the cave) suggests that raptor pellets and carnivore scat played major roles in the accumulation.
3, Site 10) LOC AL IT Y N U M B E R CM 2201. , farther in than Fissure Fill A). Material was sampled in the same way as described for Fissure Fill A, although much less volume of Fissure Fill B was sampled because it was less rich in bone. , in the roof of the adit heading toward the surface). 3, Site 11) COL L ECT ION PROTOCOLS This collection was made by DMNH crews led by Don Rasmussen in the southeast corner of the Gypsum Room. The deposit appeared to be an ancient wood rat midden against the wall.