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NARROW
GeoRef Subject
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all geography including DSDP/ODP Sites and Legs
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Africa
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Central Africa
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Angola (1)
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East Africa
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Kenya
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Lake Magadi (2)
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Lake Natron (2)
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Lake Turkana (2)
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East African Lakes
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Lake Magadi (2)
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Lake Natron (2)
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Lake Tanganyika (2)
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North Africa
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Atlas Mountains
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High Atlas (2)
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Morocco
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High Atlas (2)
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Southern Africa
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Namibia (4)
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Northern Cape Province South Africa (1)
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West Africa
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Taoudenni Basin (1)
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Far East
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Invertebrata
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Porifera
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Protista
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Vermes
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Metazoa (7)
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problematic microfossils (4)
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Plantae
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problematic fossils
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geochronology methods
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geologic age
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Cenozoic
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Tertiary
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upper Miocene
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Paleogene
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Green River Formation (2)
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Oligocene
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upper Oligocene
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Lake Bonneville (2)
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Mesozoic
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Navajo Sandstone (1)
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Paleozoic
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Carboniferous
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Pennsylvanian
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Devonian
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Old Red Sandstone (1)
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Upper Devonian
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upper Famennian (1)
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Ordovician
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Manitou Formation (1)
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Upper Ordovician
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Katian (1)
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Permian
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Upper Permian
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Changxing Formation (1)
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Lopingian
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Permian-Triassic boundary (9)
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Zechstein (1)
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Silurian
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Lockport Formation (1)
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Niagaran (1)
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Upper Silurian (1)
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Precambrian
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Archean
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Gilman Formation (1)
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Fortescue Group (1)
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Gunflint Iron Formation (1)
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upper Precambrian
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Proterozoic
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Paleoproterozoic (1)
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Sinian
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Dengying Formation (2)
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metamorphic rocks
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turbidite (3)
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minerals
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silicates
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orthosilicates
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sheet silicates
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sulfates
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gypsum (1)
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sulfides
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pyrite (3)
-
-
-
Primary terms
-
absolute age (4)
-
Africa
-
Central Africa
-
Angola (1)
-
-
East Africa
-
Kenya
-
Lake Magadi (2)
-
-
Lake Natron (2)
-
Lake Turkana (2)
-
-
East African Lakes
-
Lake Magadi (2)
-
Lake Natron (2)
-
Lake Tanganyika (2)
-
Lake Turkana (2)
-
-
North Africa
-
Atlas Mountains
-
Moroccan Atlas Mountains
-
High Atlas (2)
-
-
-
Morocco
-
Moroccan Atlas Mountains
-
High Atlas (2)
-
-
-
-
Southern Africa
-
Namibia (4)
-
South Africa
-
Northern Cape Province South Africa (1)
-
-
-
West Africa
-
Taoudenni Basin (1)
-
-
-
Arctic region (1)
-
Asia
-
Arabian Peninsula
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Oman (2)
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Saudi Arabia (1)
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United Arab Emirates
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Abu Dhabi (1)
-
-
-
Far East
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China
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Hebei China (1)
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Nanpanjiang Basin (5)
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Japan
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Middle East
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Tongue of the Ocean (1)
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South Atlantic
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Southwest Atlantic (1)
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-
-
Australasia
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Australia
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Western Australia
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Pilbara Craton (1)
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-
-
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bacteria (7)
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brines (1)
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Canada
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Eastern Canada
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Ontario
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-
-
-
-
Nunavut
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Baffin Island (1)
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Western Canada
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-
-
-
carbon
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C-13 (1)
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C-13/C-12 (24)
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C-14 (2)
-
-
Caribbean region
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West Indies
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Bahamas (5)
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Cayman Islands
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Grand Cayman Island (1)
-
-
-
-
Cenozoic
-
Quaternary
-
Holocene
-
upper Holocene (1)
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Pleistocene
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Lake Lahontan (2)
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middle Pleistocene (1)
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upper Pleistocene (1)
-
-
-
Tertiary
-
Neogene
-
Miocene
-
lower Miocene
-
Aquitanian (1)
-
-
upper Miocene
-
Messinian
-
Messinian Salinity Crisis (1)
-
-
-
-
-
Paleogene
-
Eocene
-
Green River Formation (2)
-
Lake Uinta (1)
-
-
Oligocene
-
upper Oligocene
-
Chattian (1)
-
-
-
-
-
-
Chordata
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Vertebrata (3)
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climate change (1)
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crust (1)
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crystal growth (1)
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data processing (1)
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diagenesis (23)
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ecology (1)
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education (1)
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Europe
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Alps
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Eastern Alps
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Dolomites
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Latemar Massif (1)
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-
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Central Europe
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Poland (1)
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Expedition 310
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Invertebrata
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microbialite
The Role of Cyanobacteria In the Microfabric Heterogeneity of Cambrian Leiolite, North China
Silicification of trilobites and biofilm from the Cambrian Weeks Formation, Utah: Evidence for microbial mediation of silicification: REPLY
The potential extent of Early Triassic Kockatea Shale equivalent source rocks in the Northern Carnarvon and Perth Basins, Western Australia
Sedimentary and diagenetic archive of a deeply buried, upper Ediacaran microbialite reservoir, southwestern China
ASSESSMENT OF A REEF COMMUNITY FROM LOWER JURASSIC (PLIENSBACHIAN) STRATA IN THE CENTRAL HIGH ATLAS MOUNTAINS OF MOROCCO
Advanced two- and three-dimensional insights into Earth's oldest stromatolites (ca. 3.5 Ga): Prospects for the search for life on Mars
Messinian seep-carbonates marking the transition to the evaporite deposits in the Romagna sector of the northern Apennines (Italy)
What continued after the mass extinction: insights from carbonate microfacies and biological evolution around the Permian–Triassic boundary in the middle Upper Yangtze Platform, SW China
Microbialites of modern siliciclastic rock coasts
Insights into the Devonian–Carboniferous transition and Hangenberg Event from δ 13 C carb and 87 Sr/ 86 Sr chemostratigraphy of shallow platform carbonate strata of northwestern Colorado
TAPHONOMIC CONTROLS ON MICROBIALITE TEXTURES FROM THE STEAMBOAT POINT MEMBER, UPPER ORDOVICIAN BIGHORN DOLOMITE, WESTERN TETON MOUNTAINS, USA
Prepared in conjunction with the 2022 GSA Cordilleran/Rocky Mountain Sections Joint Meeting, this Field Guide showcases trips to geologically interesting areas in Arizona, Nevada, and California. Enjoy a three-day trip to the Buckskin-Rawhide and northern Plomosa Mountains metamorphic core complexes in Arizona. In Nevada, learn about the geology of Frenchman Mountain and Rainbow Gardens and landslide deposits and mechanisms in the eastern Spring Mountains. Or learn about microbialites in Miocene and modern lakes near Las Vegas. When weather permits, unravel the geological history of southern Death Valley, and explore vertebrate paleontology and Cenozoic depositional environments in Death Valley, California.
Microbialites right under our noses: Miocene and modern lakes near Las Vegas, Nevada, USA
ABSTRACT On this field trip, we will examine a modern lake in central Nevada, the Lower Pahranagat Lake, and lacustrine carbonate outcrops of the late Miocene, upper Horse Spring Formation. Both of the modern and ancient systems hold significant microbialite populations and we interpret that the Lower Pahranagat Lake is a possible analog for the ancient unit. Both systems are or were spring-fed from a similar Paleozoic carbonate aquifer. Both have evidence of microbially influenced sedimentation, probably related to spring activity. Both are dominated by the deposition of carbonate to the exclusion of nearly all siliciclastic material. In the Lower Pahranagat Lake, we will focus on the Holocene depositional record of the lake and the microbialites that are found therein. Molecular genetic data from three sites near the Lower Pahranagat Lake suggest that carbonate deposition could be strongly mediated by varying and complex microbial communities, and that simple interpretations of carbonate geochemistry probably neglect this influence. In the Lake Mead area, we will examine both the vertical (stratigraphic) and lateral relationships between a wide diversity of microbial macro- and mesostructures, to critically evaluate the relative effects of climate change, variable lake chemistry, and the role of microbial mat metabolisms on microbialite geochemistry.