By Anthony D. Barnosky
This booklet chronicles the invention and research of animal fossils present in probably the most vital paleontological websites within the world-Porcupine Cave, positioned at an elevation of 9,500 ft within the Colorado Rocky Mountains. With tens of millions of pointed out specimens, this website has turn into the major resource of data 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 improvement and retreat of glaciers quite a few instances. beforehand, little has been understood approximately how this dramatic weather switch affected lifestyles in the course of the center Pleistocene. as well as offering cutting-edge facts from Porcupine Cave, this examine additionally provides groundbreaking research on what the information from the location exhibit in regards to the evolutionary and ecological changes that happened during this interval, laying off mild on how one of many world's so much urgent environmental concerns-global weather change-can impact existence in the world. Illustrations: fifty eight b/w pictures, seventy six line illustrations, fifty seven tables
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Extra resources for Biodiversity Response to Climate Change in the Middle Pleistocene: The Porcupine Cave Fauna from Colorado
Most UCMP samples represent subsamples of material that was collected by CM crews. 3, Site 1) LOC AL IT Y N U M B E R S CM 1928, DMNH 942, UCMP V93176. COL L ECT ION PROTOCOLS Collections housed at the CM and UCMP are split samples of the same test excavations that took place primarily in 1985, 1986, and 1987. Initially fossils were collected from the surface. 5 m3. Fossils were carefully removed as they were uncovered, but no data were recorded about depth below surface, given the nature of the deposits, which made such information meaningless in terms of time relationships.
Also included was sediment extending from the east wall of the CM squares to beneath the east wall of the alcove in which the excavation was located (this material is labeled “grid 3/4 extension”). Seven stratigraphic levels discernible by natural stratigraphic breaks were removed in 1986 and 1987, before bedrock was encountered approximately 65 cm below the surface. From top to bottom the levels are CM VR levels 1A, 1B, 2A, 2B, 2C, 3 (=3A on field labels), and 4 (=3B on field labels). Details of lithology were reported in Barnosky and Rasmussen (1988).
3 Synonymous Institutional Numbers Velvet Room, CM Excavation 19 CM 1927 UCMP V93175 Velvet Room, DMNH Excavation 20 DMNH 644 Velvet Room, Kate’s (=Katie’s) Cupola Velvet Room, Last Chance Pit Velvet Room, Mark’s Sink Velvet Room, Will’s Hole Porcupine Cave, undifferentiated 21 DMNH 1349 24 DMNH 2433 22 DMNH 1349 23 DMNH 1350 — CM 1932 DMNH 1354 UCMP V97002 Comments and Approximate Age Seven stratigraphic levels are recognized. Biostratigraphically and sedimentologically, these seem no older than Pit levels 1–4 and may be in part younger than any Pit level.
Biodiversity Response to Climate Change in the Middle Pleistocene: The Porcupine Cave Fauna from Colorado by Anthony D. Barnosky