A &gt;200 ka U‐Th Based Chronology From Lacustrine Evaporites, Searles Lake, CA

Stroup, Justin S.; Olson, Kristian J.; Lowenstein, Tim K.; Jost, A. B.; Mosher, Hayley M.; Peaple, Mark D.; Feakins, Sarah J.; Chen, Christine Y.; Lund, Steve P.; McGee, David

doi:10.1029/2022gc010685

Cited by 4 publications

(2 citation statements)

References 59 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Searles Valley contains a dry lake bed with evaporite deposits spanning the Holocene, atop deposits of lake muds deposited during Pleistocene pluvials and evaporites formed during drier periods (Knott et al, 2021;Olson & Lowenstein, 2021;Smith, 2009). The wettest times of the last 200 ka coincided with terminations T2 and T1 following the last two glacial maxima of marine isotope stages (MIS) 6 and 2 Stroup et al, 2023). Plant wax δD data corroborate independent evidence from cave carbonate δ 18 O for precipitation isotopes (Lachniet et al, 2014;Moseley et al, 2016), lending confidence to these archives of past precipitation change.…”

mentioning

confidence: 99%

Biomarker Evidence for an MIS M2 Glacial‐Pluvial in the Mojave Desert Before Warming and Drying in the Late Pliocene

Peaple,

Bhattacharya,

Tierney

et al. 2024

Paleoceanog and Paleoclimatol

Self Cite

View full text Add to dashboard Cite

Ancient lake deposits in the Mojave Desert indicate that the water cycle in this currently dry place was radically different under past climates. Here we revisit a 700 m core drilled 55 years ago from Searles Valley, California, that recovered evidence for a lacustrine phase during the late Pliocene. We update the paleomagnetic age model and extract new biomarker evidence for climatic conditions from lacustrine deposits (3.373–2.706 Ma). The MBT′5Me temperature proxy detects present‐day conditions (21 ± 3°C, n = 2) initially, followed by warmer‐than‐present conditions (25 ± 3°C, n = 17) starting at 3.268 and ending at 2.734 Ma. Bacterial and archeal biomarkers reveal lake salinity increased after 3.268 Ma likely reflecting increased evaporation in response to higher temperatures. The δ13C values of plant waxes (−30.7 ± 1.4‰, n = 28) are consistent with local C3 taxa, likely expanded conifer woodlands during the pluvial with less C4 than the Pleistocene. δD values (−174 ± 5‰, n = 25) of plant waxes indicate precipitation δD values (−89 ± 5‰, n = 25) in the late Pliocene are within the same range as the late Pleistocene precipitation δD. Microbial biomarkers identify a deep, freshwater lake and a cooling that corresponds to the onset of major Northern Hemisphere glaciation at marine isotope stage marine isotope stages M2 (3.3 Ma). A more saline lake persisted for ∼0.6 Ma across the subsequent warmth of the late Pliocene (3.268–2.734 Ma) before the lake desiccated at the Pleistocene intensification of Northern Hemisphere Glaciation.

show abstract

mentioning

confidence: 99%

Biomarker Evidence for an MIS M2 Glacial‐Pluvial in the Mojave Desert Before Warming and Drying in the Late Pliocene

Peaple,

Bhattacharya,

Tierney

et al. 2024

Paleoceanog and Paleoclimatol

Self Cite

View full text Add to dashboard Cite

show abstract

“…Searles Valley contains a dry lake bed with evaporite deposits spanning the Holocene, atop deposits of lake muds deposited during Pleistocene pluvials and evaporites formed during drier periods (Knott et al, 2021;Olson et al, 2023;Olson & Lowenstein, 2021;Smith, 2009). The wettest times of the last 200 ka coincided with the terminations (T2 and T1) following the last two glacial maxima of marine isotope stages (MIS) 6 and 2 (Peaple et al, 2022;Stroup et al, 2023). Plant wax δD data (Peaple et al, 2022) corroborate independent evidence from cave carbonate δ 18 O for precipitation isotopes (Lachniet et al, 2014;Moseley et al, 2016), lending confidence to these archives of past precipitation change.…”

Section: Introductionmentioning

confidence: 99%

Biomarker evidence for an MIS M2 glacial-pluvial in the Mojave Desert before warming and drying in the late Pliocene

Peaple

Bhattacharya

Tierney

et al. 2023

Preprint

View full text Add to dashboard Cite

Ancient lake deposits in the Mojave Desert indicate that the water cycle in this currently dry place was radically different under past climates. Here we revisit a 700 m core drilled 55 years ago from Searles Valley, California, that recovered evidence for a lacustrine phase during the late Pliocene. We update the paleomagnetic age model and extract new biomarker evidence for climatic conditions from lacustrine deposits (3.373–2.706 Ma). The MBT5Me′ temperature proxy, based on bacterial membrane lipids, detects present-day conditions (21 ± 3 ºC, 1s, n = 2) initially, followed by warmer-than-present conditions (25 ± 3 ºC, n = 17) starting at 3.268 and ending at 2.734 Ma. This is supported by salinity indicators from bacterial and archaeal biomarkers that reveal lake salinity increased after 3.268 Ma. The δ13C values of plant waxes (-30.7 ± 1.4‰, n = 28) are consistent with local C3 taxa, likely expanded conifer woodlands during the pluvial with less C4 than the Pleistocene. dD values (-174 ± 5‰, n = 25) of plant waxes indicate precipitation dD values (‑89 ± 5‰, n = 25) in the late Pliocene are within the same range as the late Pleistocene precipitation dD. Microbial biomarkers identify a deep, freshwater lake and a cooling that corresponds to the onset of major Northern Hemisphere glaciation at marine isotope stage MIS M2. A more saline lake persisted for ~0.6 Ma across the subsequent warmth of the late Pliocene before the lake desiccated at the Pleistocene intensification of Northern Hemisphere Glaciation.

show abstract

Seasonal dynamics of evaporite mineral precipitation, dissolution, and back-reactions in shallow and deep hypersaline lakes

Olson

Demicco

Lowenstein

2023

Geochimica et Cosmochimica Acta

View full text Add to dashboard Cite

A >200 ka U‐Th Based Chronology From Lacustrine Evaporites, Searles Lake, CA

Cited by 4 publications

References 59 publications

Biomarker Evidence for an MIS M2 Glacial‐Pluvial in the Mojave Desert Before Warming and Drying in the Late Pliocene

Biomarker Evidence for an MIS M2 Glacial‐Pluvial in the Mojave Desert Before Warming and Drying in the Late Pliocene

Biomarker evidence for an MIS M2 glacial-pluvial in the Mojave Desert before warming and drying in the late Pliocene

Seasonal dynamics of evaporite mineral precipitation, dissolution, and back-reactions in shallow and deep hypersaline lakes

Contact Info

Product

Resources

About