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  • 1
    Online Resource
    Online Resource
    Limnogeology: Progress, Challenges and Opportunities : A Tribute to Elizabeth Gierlowski-Kordesch (2021)
    Cham :Springer International Publishing :
    Details
    Keywords: Sedimentology. ; Geomorphology. ; Geochemistry. ; Paleontology . ; Paleoecology. ; Environment. ; Sedimentology. ; Geomorphology. ; Geochemistry. ; Paleontology. ; Paleoecology. ; Environmental Sciences.
    Description / Table of Contents: Part1. Introduction -- Chapter1. Introduction to limnogeology: progress, challenges, and opportunities—A tribute to Elizabeth Gierlowski Kordesch -- Part2. African Lake -- Chapter2. Modern and ancient animal traces in the extreme environments of Lake Magadi and Nasikie Engida, Kenya rift valley -- Part3. European lakes -- Chapter3. Lake level fluctuations and allochthonous lignite deposition in the Eocene pull-apart basin “Prinz von Hessen” (Hesse, Germany) - A palynological study -- Chapter4. How changes of past vegetation and human impact are documented in lake sediments: Paleoenvironmental research in Southwestern Germany, a review -- Chapter5. Large-scale slumps and associated resedimented deposits in Miocene lake basins from SE Spain -- Chapter6. Lacustrine and fluvial microbialites in the Neogene of the Ebro Basin, Spain: a summary of up to date knowledge -- Part4. North America -- Chapter7. Ecological response of ostracodes (Arthropoda, Crustacea) to lake level fluctuations in the Eocene Green River Formation, Fossil Basin, Wyoming, USA -- Chapter8. History of Great Salt Lake, Utah, USA, since the termination of Lake Bonneville -- Chapter9. What’s new about the old Bonneville Basin? Fresh insights about the modern Limnogeology of Great Salt Lake -- Chapter10. Middle Holocene hydrologic changes catalyzed by river avulsion in Big Soda Lake, Nevada, USA -- Chapter11. Diatom record of Holocene moisture variability in the San Bernardino Mountains, California, USA -- Chapter12. A 12,000 year diatom-based palaeoenvironmental record from Lago de Zirahuén, Mexico -- Chapter13. Sedimentary record of the Zacapu Basin, Michoacán, México and implications for P’urhépecha Culture during the Pre-Classic and Post-Classic Periods -- Chapter14. Stratigraphy and Sedimentology of the Upper Pleistocene to Holocene Lake Chalco drill cores (Mexico Basin) -- Chapter15. Submarine groundwater discharge as a catalyst for eodiagenetic carbonate cements within marine sedimentary basins -- Part5. South America -- Chapter16. Reconstructing paleoenvironmental conditions through integration of paleogeography, stratigraphy, sedimentology, mineralogy, and stable isotope data of lacustrine carbonates—an example from early Middle Triassic strata of southwest Gondwana, Cuyana Rift, Argentina -- Part6. Asia -- Chapter17. Modern sedimentary systems of Qinghai Lake -- Chapter18. Freshwater microbialites in Early Jurassic fluvial strata of the Pranhita-Godavari Gondwana Basin, India.
    Abstract: This book honors the career of Professor Elizabeth Gierlowski-Kordesch who was a pioneer and leader in the field of limnogeology since the 1980s. Her work was instrumental in guiding students and professionals in the field until her untimely death in 2016. This collection of chapters was written by her colleagues and students and recognize the important role that Professor Gierlowski-Kordesch had in advancing the field of limnogeology. The chapters show the breadth of her reach as these have been contributed from virtually every continent. This book will be a primary reference for scientists, professionals and graduate students who are interested in the latest advances in limnogeologic processes and basin descriptions in North and South America, Europe, Africa, and China. *Free supplementary material available online for chapters 3,11,12 and 13. Access by searching for the book on link.springer.com.
    Type of Medium: Online Resource
    Pages: XV, 592 p. 230 illus., 196 illus. in color. , online resource.
    Edition: 1st ed. 2021.
    ISBN: 9783030665760
    Series Statement: Syntheses in Limnogeology,
    URL: https://doi.org/10.1007/978-3-030-66576-0
    DOI: 10.1007/978-3-030-66576-0
    DDC: 551.3
    Language: English
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  • 2
    Monograph available for loan
    Monograph available for loan
    Environmental Contaminants : using natural archives to track sources and long-term trends of pollution (2015)
    Dordrecht [u.a.] : Springer Netherlands
    Associated volumes
    Details Availability
    Call number: AWI G5-15-0026
    In: Developments in paleoenvironmental research
    Description / Table of Contents: Contents: Using Natural Archives to Track Sources and Long-Term Trends of Pollution: An Introduction / Jules M. Blais, Michael R. Rosen and John P. Smol. - The Influence of Hydrology on Lacustrine Sediment Contaminant Records / Michael R. Rosen. - The Stability of Metal Profiles in Freshwater and Marine Sediments / P. M. Outridge and F. Wang. - Calculating Rates and Dates and Interpreting Contaminant Profiles in Biomixed Sediments / Zou Zou A. Kuzyk, Robie W. Macdonald and Sophia C. Johannessen. - Contaminants in Marine Sedimentary Deposits from Coal Fly Ash During the Latest Permian Extinction / Hamed Sanei, Stephen E. Grasby and Benoit Beauchamp. - Lake Sediment Records of Preindustrial Metal Pollution / Colin A. Cooke and Richard Bindler. - Lacustrine Archives of Metals from Mining and Other Industrial Activities - A Geochemical Approach / John Boyle, Richard Chiverrell and Dan Schillereff. - Organic Pollutants in Sediment Core Archives / Jennifer B. Korosi, Wenhan Cheng and Jules M. Blais. - Environmental Archives of Contaminant Particles / Neil L. Rose and Meri Ruppel. - Tracking Long-range Atmospheric Transport of Contaminants in Arctic Regions Using Lake Sediments / Jane Kirk and Amber Gleason. - Tracking Long-Range Atmospheric Transport of Trace Metals, Polycyclic Aromatic Hydrocarbons, and Organohalogen Compounds Using Lake Sediments of Mountain Regions / Jordi Catalan. - Using Peat Records as Natural Archives of Past Atmospheric Metal Deposition / Sophia V. Hansson, Richard Bindler and François De Vleeschouwer. - Historical Contaminant Records from Sclerochronological Archives / Jessica Carilli, Branwen Williams, Bernd R. Schöne, Richard A. Krause and Stewart J. Fallon. - Contaminant Records in Ice Cores / Paolo Gabrielli and Paul Vallelonga. - Use of Catalogued Long-term Biological Collections and Samples for Determining Changes in Contaminant Exposure to Organisms / Linda M. Campbell and Paul E. Drevnick. - Tracking Contaminant Transport From Biovectors / Roland Kallenborn and Jules M. Blais. - Using Natural Archives to Track Sources and Long-Term Trends of Pollution: Some Final Thoughts and Suggestions for Future Directions / Jules M. Blais, Michael R. Rosen and John P. Smol. - Index.
    Description / Table of Contents: The human footprint on the global environment now touches every corner of the world. This book explores the myriad ways that environmental archives can be used to study the distribution and long-term trajectories of chemical contaminants. The volume first focuses on reviews that examine the integrity of the historic record, including factors related to hydrology, post-depositional diffusion, and mixing processes. This is followed by a series of chapters dealing with the diverse archives and methodologies available for long-term studies of environmental pollution, such as the use of sediments, ice cores, sclerochronology, and museum specimens.
    Type of Medium: Monograph available for loan
    Pages: XVI, 509 p.
    ISBN: 9789401795401
    Series Statement: Developments in paleoenvironmental research 18
    Branch Library: AWI Library
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  • 3
    facet.materialart.12
    Limnogeology : progress, challenges and opportunities ; a tribute to Elizabeth Gierlowski-Kordesch (2021)
    Cham : Springer
    Details
    Call number: 9783030665760 (e-book)
    Description / Table of Contents: This book honors the career of Professor Elizabeth Gierlowski-Kordesch who was a pioneer and leader in the field of limnogeology since the 1980s. Her work was instrumental in guiding students and professionals in the field until her untimely death in 2016. This collection of chapters was written by her colleagues and students and recognize the important role that Professor Gierlowski-Kordesch had in advancing the field of limnogeology. The chapters show the breadth of her reach as these have been contributed from virtually every continent. This book will be a primary reference for scientists, professionals and graduate students who are interested in the latest advances in limnogeologic processes and basin descriptions in North and South America, Europe, Africa, and China. *Free supplementary material available online for chapters 3,11,12 and 13. Access by searching for the book on link.springer.com.
    Type of Medium: 12
    Pages: 1 Online-Ressource (xv, 592 Seiten) , Illustrationen, Diagramme
    ISBN: 9783030665760 , 978-3-030-66576-0
    ISSN: 2211-2731 , 2211-274X
    Series Statement: Syntheses in limnogeology
    URL: Ebook (access only within the AWI network)
    DOI: 10.1007/978-3-030-66576-0
    Language: English
    Note: Contents Part I Introduction Introduction to Limnogeology: Progress, Challenges, and Opportunities: A Tribute to Elizabeth Gierlowski-Kordesch / Michael R. Rosen, Lisa Park Boush, David B. Finkelstein, and Sila Pla-Pueyo Part II African Lake Modern and Ancient Animal Traces in the Extreme Environments of Lake Magadi and Nasikie Engida, Kenya Rift Valley / Jennifer J. Scott, Robin W. Renaut, Luis A. Buatois, R. Bernhart Owen, Emma P. McNulty, Mona Stockhecke, Kennie Leet, Tim K. Lowenstein, and M. Gabriela Mángano Part III European Lakes Lake-Level Fluctuations and Allochthonous Lignite Deposition in the Eocene Pull-Apart Basin “Prinz von Hessen” (Hesse, Germany) – A Palynological Study / Maryam Moshayedi, Olaf K. Lenz, Volker Wilde, and Matthias Hinderer How Changes of Past Vegetation and Human Impact Are Documented in Lake Sediments: Paleoenvironmental Research in Southwestern Germany, a Review / Manfred Rösch, Karl-Heinz Feger, Elske Fischer, Matthias Hinderer, Lucas Kämpf, Angelika Kleinmann, Jutta Lechterbeck, Elena Marinova, Antje Schwalb, Gegeensuvd Tserendorj, and Lucia Wick Large-Scale Slumps and Associated Resedimented Deposits in Miocene Lake Basins from SE Spain / José P. Calvo, David Gómez-Gras, and Miguel A. Rodríguez-Pascua Lacustrine and Fluvial Carbonate Microbialites in the Neogene of the Ebro Basin, Spain: A Summary of Up-to-Date Knowledge / Concha Arenas-Abad, Leticia Martin-Bello, F. Javier Pérez-Rivarés, Nerea Santos-Bueno, and Marta Vázquez-Urbez Part IV North America Ecological Response of Ostracodes (Arthropoda, Crustacea) to Lake-Level Fluctuations in the Eocene Green River Formation, Fossil Basin, Wyoming, USA /Lisa E. Park Boush, Christine M. S. Hall, Lucas S. Antonietto, and Andrew J. McFarland History of Great Salt Lake, Utah, USA: since the Termination of Lake Bonneville / Charles G. Oviatt, Genevieve Atwood, and Robert S. Thompson What’s New About the Old Bonneville Basin? Fresh Insights About the Modern Limnogeology of Great Salt Lake / Kathleen Nicoll Middle Holocene Hydrologic Changes Catalyzed by River Avulsion in Big Soda Lake, Nevada, USA / Michael R. Rosen, Liam Reidy, Scott Starratt, and Susan R. H. Zimmerman Diatom Record of Holocene Moisture Variability in the San Bernardino Mountains, California, USA / Scott W. Starratt, Matthew E. Kirby, and Katherine Glover A 12,000 Year Diatom-Based Paleoenvironmental Record from Lago De Zirahuén, Mexico / Isabel Israde-Alcántara, C. G. Vázquez, Sarah Davies, Ben Aston, and Margarita Caballero Miranda Sedimentary Record of the Zacapu Basin, Michoacán, México, and Implications for P’urhépecha Culture During the Preclassic and Postclassic Periods / Diana C. Soria-Caballero, Víctor Hugo Garduño-Monroy, Isabel Israde-Alcántara, Ángel G. Figueroa-Soto, M. Gabriela Gómez-Vasconcelos, and Nathalie Fagel Stratigraphy and Sedimentology of the Upper Pleistocene to Holocene Lake Chalco Drill Cores (Mexico Basin) / Blas Valero-Garcés, Mona Stockhecke, Socorro Lozano-García, Beatriz Ortega, Margarita Caballero, Peter Fawcett, Josef P. Werne, Erik Brown, Susana Sosa Najera, Kristin Pearthree, David McGee, Alastair G. E. Hodgetts, and Rodrigo Martínez Submarine Groundwater Discharge as a Catalyst for Eodiagenetic Carbonate Cements Within Marine Sedimentary Basins / Elizabeth H. Gierlowski-Kordesch, Gar W. Rothwell, Ruth A. Stockey, and David B. Finkelstein Part V South America Reconstructing Paleoenvironmental Conditions Through Integration of Paleogeography, Stratigraphy, Sedimentology, Mineralogy and Stable Isotope Data of Lacustrine Carbonates: An Example from Early Middle Triassic Strata of Southwest Gondwana, Cuyana Rift, Argentina / C. A. Benavente, A. C. Mancuso, and K. M. Bohacs Part VI Asia Modern Sedimentary Systems of Qinghai Lake / Jiang Zaixing and Liu Chao Freshwater Microbialites in Early Jurassic Fluvial Strata of the Pranhita-Godavari Gondwana Basin, India / Suparna Goswami and Parthasarathi Ghosh Index
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  • 4
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    Lakes as paleoseismic records in a seismically-active, low-relief area (Rieti Basin, central Italy) (2019)
    Details
    Publication Date: 2019-10-16
    Description: Small lakes in low relief areas are atypical candidates for studies on paleoseismicity, but their sediments can contain seismically induced event layers (seismites) generated through strong ground shaking, sediment transport, hydrological reorganization and/or changes in groundwater chemistry and flow. Lakes Lungo and Ripasottile are shallow lakes (〈10 m deep) located in the tectonically active Rieti Basin in the central Apennines, Italy, where strong normal faulting earthquakes (Mw 6.5 to 7.0) regularly occur. Sediment cores from these lakes provide paleoseismic indicators for the past similar to 1000 years. Sedimento-logical and geochemical analysis reveals four event layers identified in both lakes that correspond with documented large-scale earthquakes in 1298, 1349, 1639, and 1703 AD. Chronological correlation between earthquakes and paleoseismic features is reliable because of the resolution of sediment dating available for the studied cores. The common physical structure is a physically homogenous bed (homogenite) of re-suspended sediment consisting of a denser, high magnetic susceptibility (kappa) clastic base, with organic matter concentrated above. Co-seismic to post-seismic chemical signatures are associated with some event layers and may represent abrupt or transient shifts to a groundwater-dominated system, or permanent changes in groundwater flow and/or spring discharge. Excursions in delta C-13(org) may represent disruptions or changes in carbon source. Not all event layers show the same features, a result attributed to differences in seismic processes as well as the lake attributes, and anthropogenic modification. The observations made here may provide a new means of detecting paleoseismicity and may be applied to other low relief lakes in seismically active areas. (C) 2019 Elsevier Ltd. All rights reserved.
    Description: Published
    Description: 186-207
    Description: 1A. Geomagnetismo e Paleomagnetismo
    Description: 4A. Oceanografia e clima
    Description: 7A. Geofisica per il monitoraggio ambientale
    Description: JCR Journal
    Keywords: Central Italy; Limnology; Paleolimnology; Paleoseismicity; Paleomagnetism; Stable isotopes; Scanning XRF
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: article
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  • 5
    Electronic Resource
    Electronic Resource
    Developmental Changes in Alpha Adrenergic Modulation of Ventricular Pacemaker Function (1990)
    Oxford, UK : Blackwell Publishing Ltd
    Annals of the New York Academy of Sciences 588 (1990), S. 0 
    Details
    ISSN: 1749-6632
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Natural Sciences in General
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1749-6632.1990.tb13204.x
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  • 6
    Electronic Resource
    Electronic Resource
    Experimental QT Interval Prolongation (1992)
    Oxford, UK : Blackwell Publishing Ltd
    Annals of the New York Academy of Sciences 644 (1992), S. 0 
    Details
    ISSN: 1749-6632
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Natural Sciences in General
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1749-6632.1992.tb31003.x
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  • 7
    Electronic Resource
    Electronic Resource
    Estimating Rainfall Recharge and Soil Water Residence Times in Pukekohe, New Zealand, by Combining Geophysical, Chemical, and Isotopic Methods (1999)
    Oxford, UK : Blackwell Publishing Ltd
    Ground water 37 (1999), S. 0 
    Details
    ISSN: 1745-6584
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Geosciences
    Notes: The combined use of geophysical (time domain reflectometry [TDR]), isotopic (δ18 O and δ2H) and chemical (NO 3 -N, Cl) techniques indicates that residence times in the unsaturated zone of a fractured basalt aquifer in the Pukekohe region of the North Island, New Zealand, are at least six months. Each technique provides useful information on specific aspects of recharge and residence times, but combined they provide a basis for determining the mechanisms of water movement in the unsaturated zone. TDR soil moisture measurements provide similar rainfall recharge estimates as model calculations over longer time periods (monthly or seasonal) but may be more accurate for shorter time scales (weekly or daily).The TDR measurements indicate that recharge occurs mainly in the late autumn and winter months. Measurements of nitrate concentrations in the soil profile over this same period, suggest that nitrate is mineralized in the soil during the summer and is flushed past the root zone at the beginning of the recharge period, in early winter. Nitrate concentrations in the soil profile do not increase in concentration later in the recharge period, even after significant recharge events have occurred, because all stored nitrate has already been released. This pattern of nitrate movement indicates that fertilizer applications in spring and early summer will leach less to ground water and applications made in autumn and winter will leach more. Estimations of yearly recharge from mean monthly chloride concentrations (730 mm/yr) are roughly in agreement with the TDR estimates (680 mm/year). However, there is a large range in the chloride estimates (〉100%) because monthly chloride concentration measurements in both the rain and soil water vary due to the proximity of the site to the ocean.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1745-6584.1999.tb01182.x
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  • 8
    Electronic Resource
    Electronic Resource
    Sedimentology, mineralogy and isotopic analysis of Pellet Lake, Coorong region, South Australia (1988)
    Oxford, UK : Blackwell Publishing Ltd
    Sedimentology 35 (1988), S. 0 
    Details
    ISSN: 1365-3091
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geosciences
    Notes: Gravity cores of Holocene sediments from a shallow ephemeral lake in the Coorong region (Pellet Lake, southeastern coastal Australia) show a mineral assemblage and sequence particular to its hydrology. The mineralogical sequence above an initial dolomitic siliciclastic sand reflects conditions of increasing salinity in the lower portions of the core (i.e. organic-rich aragonite to magnesite + hydromagnesite + aragonite) followed by a relative decrease in salinity (i.e. magnesite + aragonite + hydromagnesite to aragonite + hydromagnesite) in the upper portions of the core. This sequence is capped by ˜ 0.4 m of micritic dolomite and minor amounts of hydromagnesite, with the relative abundance of dolomite increasing upwards. Three stratigraphically and spatially distinct dolomite units (upper, lower and margin) are recognized using stable carbon and oxygen isotope data, unit cell calculations and MgCO3 mole per cent data of the dolomite.Detailed X-ray diffraction (XRD) analyses of samples with more than 80% dolomite shows that the dolomite is ordered. Average unit cell parameters, calculated from the XRD patterns, indicate that the upper dolomite unit has crystal lattices expanded in the co direction (co= 16.09 Å) relative to ideal dolomite (co= 16.02 Å) and contracted in the ao direction (ao= 4.796 Å) relative to ideal dolomite (ao= 4.812 Å). The mol fraction of MgCO3 in the upper dolomite shows up to 4.0 ±M 2.0 mole per cent excess Mg in the dolomite crystal lattice (calculated from XRD). This unusual dolomite crystal chemistry is probably generated by rapid precipitation from solutions which have greatly elevated Mg/Ca ratios. Transmission electron microscopy reveals that the upper dolomite has a heterogeneous microstructure which also suggests rapid precipitation from solution. The modulated microstructure found in calcium-rich dolomite is completely lacking. Dolomite ordering reflections are present in electron diffraction patterns, but are weak.Stable oxygen and carbon isotope values of the upper dolomite are tightly grouped (ave. δ18O ∼+ 7.55%o, δ13C ∼+ 4.10%o), yet show three upward-lightening oxygen cycles. The oxygen cycles correlate with three upward decreases in the calculated Mg content of the dolomite zone. These cycles may indicate the increased importance of rain-water dilution of the brine at times when the water in the lake was at its shallowest levels.Analyses of the lower dolomite and the margin dolomite suggest that these units precipitated more slowly from less evaporitic brines than the upper dolomite unit. The lower dolomite is close to stoichiometric, has less evaporitic stable isotope values than the upper dolomite, and has only a slightly expanded co-axis. The margin dolomite is Ca-rich, has a more homogeneous microstructure, and has expanded ao and co axes.The abundance of relatively soluble Mg-bearing phases, such as hydromagnesite and magnesite, may supply additional magnesium for the dolomitization of aragonite and calcite during subsequent diagenesis and burial of the sediment. This process may leave a finely laminated dolomicrite deposit which retains little, if any, evidence of evaporite minerals.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-3091.1988.tb00907.x
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  • 9
    Electronic Resource
    Electronic Resource
    A new location of Holocene dolomite formation, Lake Hayward, Western Australia (1992)
    Oxford, UK : Blackwell Publishing Ltd
    Sedimentology 39 (1992), S. 0 
    Details
    ISSN: 1365-3091
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geosciences
    Notes: Holocene dolomite forms in the sediment of Lake Hayward, a small permanent hypersaline lake in the Clifton-Preston Lakeland System, Western Australia. The geomorphological setting of dolomite formation in Lake Hayward is similar to the Coorong region in South Australia. Unlike in the Coorong region, dolomite in Lake Hayward does not form as a direct precipitate from the lake water, but is of diagenetic origin. This can be deduced from the following features: (1) the dolomite occurs only below 60–70 cm from the sediment-water interface, (2) dolomite occurs as luminescing cement, and (3) dolomite has pristine well-formed rhomb-shaped crystals. The source of magnesium for dolomitization is probably from the concentration on inflowing groundwater by evaporation and the selective removal of calcium by chemical and biological aragonite/calcite precipitation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-3091.1992.tb01028.x
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  • 10
    Electronic Resource
    Electronic Resource
    The origin and significance of groundwater-seepage gypsum from Bristol Dry Lake, California, USA (1990)
    Oxford, UK : Blackwell Publishing Ltd
    Sedimentology 37 (1990), S. 0 
    Details
    ISSN: 1365-3091
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geosciences
    Notes: Gypsum and anhydrite fabrics observed in trenches and deep (500 m) cores from Bristol Dry Lake, California, USA, exhibit a vertical alignment of crystals similar to the fabric seen in bottom-nucleated brine pond gypsum. However, geochemical and sedimentological evidence indicate that the gypsum formed in Bristol Dry Lake precipitated displacively within the sediment where groundwater saturated with respect to gypsum recharges around the playa margin (groundwater-seepage gypsum). Evidence for displacive growth of gypsum is: (i) the geometry of the deposit, (ii) stable isotopic data and the water chemistry of the brine, and (iii) inclusions of matrix which follow twin planes and completely surround crystals as they grow.The bulk of the gypsum precipitated in the playa occurs around the edges of the playa in the playamargin facies and completely rings the lake. Sulphate concentrations in the groundwater increase toward the gypsum zone in the playa margin. Basinward of this zone, sulphate concentrations decrease sharply to trace element levels in the basin centre brine. Authigenic gypsum is rare in the centre of the playa. Stable (δ18O values measured for gypsum waters of crystallization (GWC) are similar to the values calculated for groundwater in the playa margin and alluvial fan sediments (˜– 6%0), whereas measured brine δ18O values range from + 0·5 to + 3·7%0. Deuterium values measured for groundwater are ˜– 70%0, GWC are ˜– 60 to – 65%0 and brine values are ˜– 57%0. The geometry of the deposit and the chemical data suggest that the water precipitating the gypsum is more closely associated with the groundwater than the brine. However, some mixing between groundwater and brine is likely.Within 100 m of the surface, the gypsum dehydrates to anhydrite, although the same vertically aligned fabric is retained through the diagenetic process. The similarity of displacive vertically aligned gypsum and anhydrite fabrics seen in Bristol Dry Lake to subaqueously deposited gypsum in modern brine ponds indicates that the criteria used to define subaqueous fabrics must be better constrained.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-3091.1990.tb01840.x
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