Lower Pahranagat Lake: modern analogue for extensive carbonate deposition in paleolakes of the Late Oligocene to Miocene Rainbow Gardens and Horse Spring Formations

Hickson, Thomas A.; Theissen, Kevin M.; Lamb, Melissa A.; Frahm, J.

doi:10.1007/s10933-016-9923-1

Cited by 7 publications

(14 citation statements)

References 24 publications

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“…Hickson et al (2018) described several sedimentary facies for LPAH12-1 cores representing the last ~2000 cal yr. LPAH sediments are primarily carbonate muds and silts with some intervals showing wavy laminations and other fabrics that are interpreted as microbial in origin. Peloidal textures dominate the carbonate sediments, with some millimeter-scale irregular and wavy laminae at irregular intervals that we interpret as thin microbial mat material based on modern analogs that have been identified in the lake (see figs.…”

Section: Resultsmentioning

confidence: 99%

“…We subsampled LPAH12-1B at 5 cm intervals and LPAH16-1A at 10 cm intervals for O and C stable isotopic analysis of fine-fraction (<63 µm) authigenic carbonate. Sample preparation and analysis are described in Hickson et al (2018). Analysis was primarily completed in the Stable Isotope Laboratory at the University of Minnesota where replicate analysis of 37% of 128 samples showed average standard deviations of 0.029‰ for δ 13 C and 0.147‰ for δ 18 O.…”

Section: Methodsmentioning

confidence: 99%

“…Local volcanic aquifer springs are indicated with red dots. (C) Map of LPAH, showing modern vegetation and coring site (modified from Hickson et al, 2018). (For interpretation of the references to color in this figure legend, the reader is referred to the web version of this article.…”

Section: Introductionmentioning

confidence: 99%

“…1B and C). Hickson et al (2018) provide a detailed description of the LPAH site, including modern ecology, water chemistry, and geologic setting.…”

Section: Introductionmentioning

confidence: 99%

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A record of mid- and late Holocene paleohydroclimate from Lower Pahranagat Lake, southern Great Basin

Theissen¹,

Hickson²,

Brundrett³

et al. 2019

Quat. res.

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We present a continuous, sediment core-based record of paleohydroclimate spanning ~5800 cal yr BP to recent from Lower Pahranagat Lake (LPAH), a shallow, alkaline lake in southern Nevada. We apply stable isotopes (δ18O and δ13C) from fine-fraction authigenic carbonate, which are sensitive recorders of hydroclimatic variability in this highly evaporative region. Additional geochemical proxies (total organic carbon, C/N, and total inorganic carbon) provide supporting information on paleoecological change in and around the lake. Our data suggest progressively wetter conditions starting at the later part of the middle Holocene and extending into the late Holocene (~5500–3350 cal yr BP) followed by a millennial-scale dry period from ~3150 to 1700 cal yr BP. This latter interval encompasses the ‘Late Holocene dry period’ (LHDP) reported by other investigators, and our data help refine the area affected in this episode. Our data also show evidence for a series of century-scale fluctuations in regional hydroclimate, including wet and dry intervals between 2350 and 1600 cal yr BP, and drier conditions over the past few centuries. Paleohydroclimate trends in the LPAH record show correspondence with those from the central Great Basin to the north, suggesting that both areas were subject to similar climatic forcings.

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Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…1B and C). Hickson et al (2018) provide a detailed description of the LPAH site, including modern ecology, water chemistry, and geologic setting.…”

Section: Introductionmentioning

confidence: 99%

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A record of mid- and late Holocene paleohydroclimate from Lower Pahranagat Lake, southern Great Basin

Theissen¹,

Hickson²,

Brundrett³

et al. 2019

Quat. res.

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“…Paces and Wurster (2014) found that modern surface waters in the PNWR are comprised of a 65:25:10 mixture of three primary spring sources, with 90% ultimately coming from a deep regional aquifer in Paleozoic carbonates, and the remaining 10% from a local aquifer in shallow Tertiary volcanics. Between 2012-2016 several sediment cores were collected from Lower Pahranagat Lake (LPAH) at the southern end of the PNWR (Hickson et al, 2018). The composite core record from LPAH spans ~5800 14 C cal yr BP (Theissen et al, in review).…”

Section: Introductionmentioning

confidence: 99%

Strontium and uranium isotopes from lacustrine carbonates as a paleohydrologic tracer in arid wetlands: An example from the Pahranagat Valley, Nevada

Theissen¹,

Paces²,

Duggan³

2018

Preprint

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2. Study Site LPAH is a small (1.2 km 2), shallow (avg. depth <1 m, max. depth 1.5 m), alkaline lake in The PNWR, a 17.7 km long, 21.8 km 2 area of marshes, impoundments, and shallow lakes that lies at the southern end of the Pahranagat Valley in southern Nevada (Fig. 1A and B). LPAH is spring-fed, receiving water from a number of springs that discharge north of the lake, then owing south through the Pahranagat Valley (Fig. 1A). The deep regional carbonate aquifer extends north to Great Basin National Park, east into Utah, and south to Death Valley and Lake Mead (Eakin 1963). U.S. Geological Survey stream-gages for the two highest discharge springs, Crystal, and Ash discharged at 340 l s-1 and 510 l s-1 between 2004-09 with discharge at a relatively constant rate throughout the year (Paces and Wurster, 2014). The Pahranagat Valley is in a region with some of the highest evaporation rates in the U.S. Wurster (2010) calculated that open water evaporation approaches 1676 mm yr-1 , greater than 10 times the average annual precipitation.

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International Limnogeology Congress (ILIC6), Reno USA, special issue on new limnogeological research focused on pre-Holocene lake systems

Rosen

Starratt

2017

J Paleolimnol

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Lower Pahranagat Lake: modern analogue for extensive carbonate deposition in paleolakes of the Late Oligocene to Miocene Rainbow Gardens and Horse Spring Formations

Cited by 7 publications

References 24 publications

A record of mid- and late Holocene paleohydroclimate from Lower Pahranagat Lake, southern Great Basin

A record of mid- and late Holocene paleohydroclimate from Lower Pahranagat Lake, southern Great Basin

Strontium and uranium isotopes from lacustrine carbonates as a paleohydrologic tracer in arid wetlands: An example from the Pahranagat Valley, Nevada

International Limnogeology Congress (ILIC6), Reno USA, special issue on new limnogeological research focused on pre-Holocene lake systems

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