TIMING AND PALEOCLIMATE SIGNIFICANCE OF THE LATE REGRESSIVE PHASE OF LAKE BONNEVILLE AND THE GILBERT EPISODE, GREAT SALT LAKE BASIN, UT

2016 ◽  
Author(s):  
Charles G. Oviatt ◽  
Keyword(s):  
Salt Lake ◽  
Great Salt Lake ◽  
Lake Basin ◽  
Lake Bonneville ◽  
Regressive Phase

Shorelines and vertebrate fauna of Pleistocene Lake Bonneville, Utah, Idaho, and Nevada

2017 ◽  
Vol 4 ◽  
pp. 181-214 ◽  
Author(s):  
Mark Milligan ◽  
H. Gregory McDonald
Keyword(s):  
Salt Lake ◽  
Great Salt Lake ◽  
Lake Levels ◽  
Lake Bonneville ◽  
Vertebrate Fauna ◽  
World Class

Pleistocene Lake Bonneville created many classic examples of lacustrine shoreline landforms, which preserve a wide variety of vertebrate fossils. _is _eld guide provides a review of the published literature for a sampling of the lake’s world-class localities. _is guide also provides a brief overview of modern Great Salt Lake and its microbialites recently exposed by near-record low lake levels. Stops include G.K. Gilbert Geologic View Park, Draper spit, Steep Mountain beach, Point of the Mountain spit, American Fork delta, Stockton Bar, and Great Salt Lake State Park.

GSA in the Field in 2020

2021 ◽  
Author(s):  
Brian L. Cousens ◽  
Nancy Riggs
Keyword(s):  
Annual Meeting ◽  
Salt Lake ◽  
Great Salt Lake ◽  
Rocky Mountain ◽  
Lake Bonneville ◽  
Section Meeting ◽  
Virtual Spaces

COVID-19 made for a highly unusual year as it affected almost every facet of life. The pandemic made gathering and visiting the field nearly impossible as we quarantined and moved into virtual spaces. Three groups submitted guides for publication during the height of the pandemic: two for trips that would have taken place during the GSA Annual Meeting in Montréal, Canada, and one from the Rocky Mountain Section Meeting in Provo, Utah, USA. Readers will enjoy these journeys to the Ottawa aulacogen/graben on the Northeast U.S.–Canadian border; the southern Québec Appalachians; and Lake Bonneville, the Wasatch Range, and Great Salt Lake in Utah.

Climate and Diet in Fremont Prehistory: Economic Variability and Abandonment of Maize Agriculture in the Great Salt Lake Basin

2002 ◽  
Vol 67 (3) ◽  
pp. 453-485 ◽  
Author(s):  
Joan Brenner Coltrain ◽  
Steven W. Leavitt
Keyword(s):  
Stable Isotope ◽  
Salt Lake ◽  
Great Salt Lake ◽  
Temporal Correlation ◽  
Bone Collagen ◽  
Initial Increase ◽  
Lake Basin ◽  
Maize Agriculture ◽  
Economic Diversity ◽  
Economic Strategies

Research reported here is based on the stable isotope (δ 13C,δ 15N) and radiocarbon chemistry of Fremont burials from wetlands lining the eastern shores of the Great Salt Lake (GSL). Bone collagen stable isotope signatures covary with reliance on maize and intake of animal protein, facilitating useful reconstructions of past diet. Among the GSL Fremont, economic strategies vary over time with an initial increase in reliance on maize (A.D. 400–850) followed by a period of marked economic diversity (A.D 850–1150) then a return to reliance on wild foods (after A.D. 1150). During the period of greatest economic diversity, male and female diets vary significantly and male diets are correlated with status differences evidenced by grave goods. There is also a clear temporal correlation between the rapid abandonment of maize agriculture and significant moisture anomalies in regional tree-ring chronologies and pollen profiles. These results are discussed in the context of recent arguments regarding economic diversity, social complexity, and the demise of the Fremont.

Shorelines and vertebrate fauna of Pleistocene Lake Bonneville, Utah, Idaho, and Nevada

2017 ◽  
Vol 4 ◽  
pp. 181-214 ◽  
Author(s):  
Mark Milligan ◽  
H. McDonald
Keyword(s):  
Salt Lake ◽  
Great Salt Lake ◽  
Lake Levels ◽  
Field Guide ◽  
Lake Bonneville ◽  
Vertebrate Fauna ◽  
World Class

Pleistocene Lake Bonneville created many classic examples of lacustrine shoreline landforms, which preserve a wide variety of vertebrate fossils. This field guide provides a review of the published literature for a sampling of the lake’s world-class localities. This guide also provides a brief overview of modern Great Salt Lake and its microbialites recently exposed by near-record low lake levels. Stops include G.K. Gilbert Geologic View Park, Draper spit, Steep Mountain beach, Point of the Mountain spit, American Fork delta, Stockton Bar, and Great Salt Lake State Park.

Early Holocene Great Salt Lake, USA

2015 ◽  
Vol 84 (1) ◽  
pp. 57-68 ◽  
Author(s):  
Charles G. Oviatt ◽  
David B. Madsen ◽  
David M. Miller ◽  
Robert S. Thompson ◽  
John P. McGeehin
Keyword(s):  
Great Basin ◽  
Salt Lake ◽  
Great Salt Lake ◽  
Lake Basin ◽  
Basin Floor ◽  
Lake Floor ◽  
Sulfate Salts ◽  
Brine Shrimp Cysts ◽  
Surficial Deposits ◽  
Apparent Conflict

Shorelines and surficial deposits (including buried forest-floor mats and organic-rich wetland sediments) show that Great Salt Lake did not rise higher than modern lake levels during the earliest Holocene (11.5–10.2 cal ka BP; 10–9 14C ka BP). During that period, finely laminated, organic-rich muds (sapropel) containing brine-shrimp cysts and pellets and interbedded sodium-sulfate salts were deposited on the lake floor. Sapropel deposition was probably caused by stratification of the water column — a freshwater cap possibly was formed by groundwater, which had been stored in upland aquifers during the immediately preceding late-Pleistocene deep-lake cycle (Lake Bonneville), and was actively discharging on the basin floor. A climate characterized by low precipitation and runoff, combined with local areas of groundwater discharge in piedmont settings, could explain the apparent conflict between evidence for a shallow lake (a dry climate) and previously published interpretations for a moist climate in the Great Salt Lake basin of the eastern Great Basin.

scholarly journals Contributions of Lake-Effect Periods to the Cool-Season Hydroclimate of the Great Salt Lake Basin

2013 ◽  
Vol 52 (2) ◽  
pp. 341-362 ◽  
Author(s):  
Kristen N. Yeager ◽  
W. James Steenburgh ◽  
Trevor I. Alcott
Keyword(s):  
Snow Water Equivalent ◽  
Salt Lake ◽  
Great Salt Lake ◽  
Hypersaline Lake ◽  
Lake Basin ◽  
Cool Season ◽  
Lake Effect ◽  
Precipitation Estimates ◽  
Radar Imagery ◽  
Precipitation Gauge

AbstractAlthough smaller lakes are known to produce lake-effect precipitation, their influence on the precipitation climatology of lake-effect regions remains poorly documented. This study examines the contribution of lake-effect periods (LEPs) to the 1998–2009 cool-season (16 September–15 May) hydroclimate in the region surrounding the Great Salt Lake, a meso-β-scale hypersaline lake in northern Utah. LEPs are identified subjectively from radar imagery, with precipitation (snow water equivalent) quantified through the disaggregation of daily (i.e., 24 h) Cooperative Observer Program (COOP) and Snowpack Telemetry (SNOTEL) observations using radar-derived precipitation estimates. An evaluation at valley and mountain stations with reliable hourly precipitation gauge observations demonstrates that the disaggregation method works well for estimating precipitation during LEPs. During the study period, LEPs account for up to 8.4% of the total cool-season precipitation in the Great Salt Lake basin, with the largest contribution to the south and east of the Great Salt Lake. The mean monthly distribution of LEP precipitation is bimodal, with a primary maximum from October to November and a secondary maximum from March to April. LEP precipitation is highly variable between cool seasons and is strongly influenced by a small number of intense events. For example, at a lowland (mountain) station in the lake-effect-precipitation belt southeast of the Great Salt Lake, just 12 (13) events produce 50% of the LEP precipitation. Although these results suggest that LEPs contribute modestly to the hydroclimate of the Great Salt Lake basin, infrequent but intense events have a profound impact during some cool seasons.

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