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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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East African Lakes
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Lake Kariba (1)
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North Africa
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Libya
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Murzuk Basin (1)
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Nubian Shield (1)
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Southern Africa
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South Africa
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Western Cape Province South Africa (1)
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Zimbabwe (1)
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Asia
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Far East
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metals
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oxygen
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fossils
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Chondrites ichnofossils (19)
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Invertebrata
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Vermes
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geochronology methods
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geologic age
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Tertiary
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Paleocene
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lower Paleocene
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Mesozoic
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Cretaceous
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Lower Cretaceous
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Gething Formation (1)
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Mowry Shale (1)
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Lower Greensand (1)
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Mancos Shale (1)
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Upper Cretaceous
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Blackhawk Formation (1)
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Campanian (2)
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Cenomanian
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upper Cenomanian (2)
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Cody Shale (1)
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Demopolis Chalk (1)
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K-T boundary (2)
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Paleozoic
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Chilhowee Group (1)
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Upper Mississippian
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Pennsylvanian
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Dunkard Group (1)
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Ordovician
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Upper Permian
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Permian-Triassic boundary (1)
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Phanerozoic (3)
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Precambrian
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upper Precambrian
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Proterozoic
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Wyman Formation (2)
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meteorites
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meteorites (2)
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minerals
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Primary terms
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Africa
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East African Lakes
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Lake Kariba (1)
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North Africa
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Libya
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Murzuk Basin (1)
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Nubian Shield (1)
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Southern Africa
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South Africa
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Western Cape Province South Africa (1)
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Zimbabwe (1)
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-
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Asia
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Altai Mountains
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Mongolian Altai (1)
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Arabian Peninsula
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Arabian Shield (1)
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Far East
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China
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Guizhou China (1)
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Sichuan China (1)
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Yunnan China
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Mongolia
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Gobi Desert (1)
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Middle East
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Israel
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Timna (1)
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Jordan (1)
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West Siberia
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Atlantic Ocean
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bibliography (1)
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Canada
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Maritime Provinces
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Western Canada
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carbon
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Cenozoic
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Quaternary
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Pleistocene (1)
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Tertiary
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Neogene
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Miocene (2)
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Paleogene
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Oligocene (2)
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lower Paleocene
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Deep Sea Drilling Project (1)
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Europe
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Italy
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geochemistry (2)
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Graptolithina (1)
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ichnofossils
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-
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Invertebrata
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Ostracoda (1)
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Insecta (2)
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Trilobitomorpha
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Brachiopoda (1)
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-
-
Protista
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Foraminifera
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Rotaliina
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Globigerinacea
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-
Globigerina (1)
-
-
-
-
-
Radiolaria (1)
-
-
Vermes
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Annelida (1)
-
Polychaeta
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Serpulidae (1)
-
-
-
-
isotopes
-
stable isotopes
-
C-13/C-12 (1)
-
O-18/O-16 (1)
-
-
-
Mesozoic
-
Cretaceous
-
Lower Cretaceous
-
Gething Formation (1)
-
Mannville Group (1)
-
Mowry Shale (1)
-
Valanginian (1)
-
-
Lower Greensand (1)
-
Mancos Shale (1)
-
Upper Cretaceous
-
Blackhawk Formation (1)
-
Campanian (2)
-
Cenomanian
-
upper Cenomanian (2)
-
-
Cody Shale (1)
-
Demopolis Chalk (1)
-
Frontier Formation (1)
-
Gulfian
-
Austin Chalk (1)
-
Austin Group (1)
-
-
K-T boundary (2)
-
Maestrichtian (1)
-
Mesaverde Group (1)
-
Selma Group (1)
-
Senonian (2)
-
Shannon Sandstone Member (1)
-
Turonian (1)
-
Wall Creek Member (1)
-
-
-
Jurassic
-
Lower Jurassic
-
Pliensbachian (1)
-
-
Middle Jurassic
-
Bajocian (1)
-
Callovian (1)
-
-
Upper Jurassic
-
Oxfordian (1)
-
-
-
Nugget Sandstone (1)
-
Triassic
-
Lower Triassic
-
Permian-Triassic boundary (1)
-
Spathian (1)
-
-
Moenkopi Formation (1)
-
Montney Formation (1)
-
Upper Triassic (2)
-
-
-
metals
-
alkaline earth metals
-
calcium (1)
-
-
manganese (1)
-
-
meteorites (2)
-
North America
-
Appalachians
-
Central Appalachians (1)
-
-
Basin and Range Province
-
Great Basin (1)
-
-
Western Canada Sedimentary Basin (2)
-
-
oil and gas fields (2)
-
oxygen
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O-18/O-16 (1)
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Pacific Ocean (1)
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paleoclimatology (1)
-
paleoecology (18)
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paleogeography (4)
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paleontology (6)
-
Paleozoic
-
Cambrian
-
Lower Cambrian
-
Chilhowee Group (1)
-
Poleta Formation (2)
-
Tommotian (1)
-
-
Middle Cambrian
-
Burgess Shale (1)
-
-
-
Carboniferous
-
Mississippian
-
Harrodsburg Limestone (1)
-
Middle Mississippian (1)
-
Upper Mississippian
-
Meramecian
-
Saint Louis Limestone (1)
-
Sainte Genevieve Limestone (1)
-
Salem Limestone (1)
-
-
-
-
Pennsylvanian
-
Minturn Formation (1)
-
Monongahela Group (1)
-
-
-
Dunkard Group (1)
-
Ordovician
-
Lower Ordovician
-
Tremadocian (1)
-
-
Middle Ordovician (1)
-
Upper Ordovician
-
Hirnantian (1)
-
-
-
Permian
-
Lower Permian
-
Cisuralian
-
Asselian (1)
-
Sakmarian (1)
-
-
-
Upper Permian
-
Permian-Triassic boundary (1)
-
-
-
Silurian
-
Lower Silurian (1)
-
-
-
petroleum
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natural gas (1)
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Phanerozoic (3)
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Plantae
-
algae
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nannofossils (1)
-
-
-
plate tectonics (2)
-
Precambrian
-
upper Precambrian
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Proterozoic
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Neoproterozoic
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Vendian (1)
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Wyman Formation (2)
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problematic fossils (1)
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remote sensing (1)
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sea-level changes (3)
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sedimentary petrology (5)
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sedimentary rocks
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carbonate rocks
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chalk (2)
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limestone (3)
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chemically precipitated rocks
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ironstone (1)
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clastic rocks
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claystone (2)
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conglomerate (2)
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red beds (1)
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sandstone (10)
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shale (2)
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siltstone (3)
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coal (2)
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sedimentary structures
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bedding plane irregularities
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ripple marks (2)
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biogenic structures
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algal structures
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algal mats (1)
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bioturbation (15)
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lebensspuren (9)
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planar bedding structures
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bedding (1)
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cross-bedding (4)
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cross-laminations (1)
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cross-stratification (4)
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hummocky cross-stratification (1)
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rhythmic bedding (2)
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sand bodies (1)
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rhizoliths (1)
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sedimentation (12)
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sediments
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clastic sediments
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alluvium (1)
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sand (1)
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South America
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Andes (1)
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Argentina
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Neuquen Argentina (1)
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Neuquen Basin (1)
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Venezuela (1)
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stratigraphy (5)
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United States
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Alabama
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Book Cliffs (1)
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California
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Planolites
Ordovician matground and mixground ecosystems in shoreface–offshore and barrier-island environments from Central Iran, northern Gondwana
Abstract Micritic sediments containing dark, discrete, organic-rich burrows, situated in a light grey background carbonate mud, were deposited over a broad geographical area in deep-shelf, bathyal and basinal environments in the western margin of the Tethys Ocean during the Early and Middle Jurassic. These hemipelagic deposits represent a distinct depositional regime marked by low-energy, soft-bottom and only locally dysoxic environments. Still, it is unclear whether the trace-fossil assemblages occurring in these deposits pertain to a network of several community types – the ichnotaxa differing from basin to basin – or to a single community of environmentally broad-ranging, burrow-producing species. Lower Jurassic trace-fossil assemblages are found in the Western Carpathians and in the Subbetic, Betic Cordillera: that is, in basins separated by more than 2000 km in their original palaeogeographical areas. The stereotypical Chondrites and Zoophycos trace-fossil assemblages that occur in the analysed deposits share two ichnogenera of distinctive morphology ( Lamellaeichnus and Teichichnus ). Agglutinated foraminifera Bathysiphon occurs together with the described trace-fossil assemblage and determines the epibenthic palaeoenvironmental conditions. In the Western Carpathians, a Lamellaeichnus -dominated assemblage alternates with a Zoophycos -dominated assemblage in small, metre-scale cycles in the upper Pliensbachian, and the proportion of the Zoophycos assemblage increases stratigraphically upwards, probably owing to reduced basin ventilation during the early Toarcian. Within the southern Iberian palaeomargin, represented by the Betic Cordillera, Zoophycos is scarce in the facies.
INVERTEBRATE AND PLANT TRACE FOSSILS FROM THE TERRESTRIAL LATE TRIASSIC OF ZIMBABWE
Cold feet: Trackways and burrows in ice-marginal strata of the end-Ordovician glaciation (Table Mountain Group, South Africa)
Rapid macrobenthic diversification and stabilization after the end-Cretaceous mass extinction event
BURROWS AND ICHNOFABRIC PRODUCED BY CENTIPEDES: MODERN AND ANCIENT EXAMPLES
Sedimentology of a “nonactualistic” Middle Ordovician tidal-influenced reservoir in the Murzuq Basin (Libya)
High-frequency sequences, paleogeography, and syn-depositional tectonism on a shallow clastic ramp: Doe Creek and Pouce Coupe members of the Late Cenomanian Kaskapau Formation, Western Canada Foreland Basin
ICHNOFABRICS FROM A CRETACEOUS EOLIAN SYSTEM OF WESTERN ARGENTINA: EXPANDING THE APPLICATION OF CORE ICHNOLOGY TO DESERT ENVIRONMENTS
Early Triassic trace fossils from South China marginal-marine settings: Implications for biotic recovery following the end-Permian mass extinction
A bed by bed analysis of the Bonarelli Level (late Cenomanian) in the Bottaccione Gorge and the Contessa Valley (Gubbio, Italy, area) reveals ichnofabric variations that follow lithofacies changes. Ichnofabric analysis has been approached in ~60 samples for every section, using thin sections of rocks and wet cut surfaces for three-dimensional observations. The ichnofabric includes five ichnotaxa: Chondrites isp., Planolites isp., Thalassinoides isp., Trichichnus linearis , and Zoophycos isp.; their abundance and preservation fluctuate with the substrate consistency, oxygen content, and productivity. The ichnotaxa are absent in many beds that show primary lamination and were deposited under true anoxic conditions, but it is surprising that they are present in many thin beds inside the Bonarelli interval (10 in Bottaccione and 14 in Contessa). In the underlying and overlying Scaglia Bianca (late Cenomanian) carbonate deposits, the presence of a totally bioturbated background, together with superimposed discrete trace fossils (the same ichnotaxa as in the Bonarelli Level), reveals the absence of anoxic conditions (except for cherty layers), but the presence of minor fluctuations between aerobic and slightly dysaerobic conditions is marked by changes in ichnotaxa abundance.