Reconstructing paleohydrology in the northwest Great Basin since the last deglaciation using Paisley Caves fish remains (Oregon, U.S.A.)

Late glacial through Early Holocene environments inferred using pollen from coprolites and sediments recovered from Paisley Caves, Oregon

“…After the YD, there was warming and increased effective moisture in conjunction with increasing insolation during Northern Hemisphere summers (Kutzbach et al, 1998). While the YD shorelines are poorly constrained at Summer Lake, it appears likely that Summer Lake levels rose at the start of the Holocene (Hudson et al, 2021), as has been suggested for nearby Warner Lake (Wriston and Smith, 2017).…”

“…P1: Late Pleistocene BA to Holocene Hudson et al (2019Hudson et al ( , 2021 characterize conditions in the Chewaucan Basin during the terminal B-A (ca. 13,000 cal yr BP) as warming with high effective moisture and a deeper lake than immediately prior, with the shoreline only 17 m below and within 100 m horizontally of the base of 5-Mile Point Butte.…”

“…This east side is composed of fault block features that increase in elevation for 13 km up to approximately 1590 m, after which the topography then slopes down 13 km east to Lake Abert. The Summer Lake lakebed slopes little south of 5-Mile Point Butte, where the topography is interrupted by the incised course of a stream that resulted from the overflow of ZX Lake into Summer Lake during the YD (Allison, 1982; Friedel, 1993; Licciardi, 2001; Hudson et al, 2021).…”

“…The YD cold period (12,800-11,600 cal yr BP) is characterized by a return to cooler temperatures in the Northern Hemisphere (Mayewski et al, 1993;Rasmussen et al, 2014). At this time, Summer Lake began receding due to lower precipitation and increasing summer insolation (Hudson et al, 2019(Hudson et al, , 2021. The climate began to warm after the YD, eventually resulting in climatic conditions being warmer during the earliest portions of the Holocene (11,000-9000 cal yr BP), with evidence of a brief period of increased precipitation that resulted in a transgression of Summer Lake to moderately high levels, although not as high as during the BA (Hudson et al, 2021).…”

“…At this time, Summer Lake began receding due to lower precipitation and increasing summer insolation (Hudson et al, 2019(Hudson et al, , 2021. The climate began to warm after the YD, eventually resulting in climatic conditions being warmer during the earliest portions of the Holocene (11,000-9000 cal yr BP), with evidence of a brief period of increased precipitation that resulted in a transgression of Summer Lake to moderately high levels, although not as high as during the BA (Hudson et al, 2021). Conditions reached thermal and aridity maxima after 9000 cal yr BP, after which climatic conditions began to cool but remained arid (Friedel, 1993;Bartlein et al, 1998Bartlein et al, , 2011Cohen et al, 2000;Benson et al, 2002;Mensing et al, 2004;Minckley et al, 2007;Long et al, 2019;Hudson et al, 2021).…”