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Rodentia
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Protista
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Globorotaliidae
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Neogloboquadrina
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Orbitoidacea
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Textulariina
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Cenozoic
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Koobi Fora Formation (1)
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Quaternary
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Weichselian
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upper Quaternary (5)
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Siwalik System (3)
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Tertiary
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middle Miocene
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Choptank Formation (2)
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Saint Marys Formation (1)
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Messinian (1)
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Pliocene
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Paleogene
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Chadron Formation (1)
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Priabonian (1)
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lower Paleogene (1)
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Oligocene
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Brule Formation (2)
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Suwannee Limestone (2)
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Chattian (1)
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Paleocene
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K-T boundary (6)
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Tullock Member (1)
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Paleocene-Eocene Thermal Maximum (1)
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Renova Formation (1)
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White River Group (2)
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Shahejie Formation (2)
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upper Cenozoic
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Pinecrest Beds (1)
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Tamiami Formation (1)
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Villafranchian (1)
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Coal Measures (2)
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Dalradian (1)
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Laurentide ice sheet (1)
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Mesozoic
-
Bisbee Group (1)
-
Cretaceous
-
Blairmore Group (1)
-
Comanchean
-
Buda Limestone (1)
-
-
Logan Canyon Formation (1)
-
Lower Cretaceous
-
Agrio Formation (1)
-
Albian (2)
-
Aptian (2)
-
Barremian (1)
-
Clearwater Formation (1)
-
Hauterivian (1)
-
Mannville Group (2)
-
Missisauga Formation (1)
-
Mural Limestone (1)
-
-
Middle Cretaceous
-
Bhuj Series (1)
-
-
Upper Cretaceous
-
Belly River Formation (1)
-
Buda Limestone (1)
-
Campanian
-
Dinosaur Park Formation (2)
-
-
Cenomanian (1)
-
Coniacian (1)
-
Gulfian
-
Austin Chalk (1)
-
Eagle Ford Formation (1)
-
-
Hell Creek Formation (6)
-
Horseshoe Canyon Formation (2)
-
Javelina Formation (1)
-
Judith River Formation (1)
-
Kanguk Formation (1)
-
K-T boundary (6)
-
Lance Formation (2)
-
Maestrichtian
-
lower Maestrichtian (1)
-
upper Maestrichtian (2)
-
-
Navesink Formation (1)
-
Niobrara Formation (1)
-
Oldman Formation (2)
-
Pierre Shale (2)
-
Senonian (5)
-
Straight Cliffs Formation (1)
-
Two Medicine Formation (2)
-
-
-
Great Valley Sequence (1)
-
Jurassic
-
Arapien Shale (1)
-
Carmel Formation (1)
-
Lower Jurassic
-
Hettangian (2)
-
lower Liassic (2)
-
Sinemurian (1)
-
-
Mic Mac Formation (1)
-
Middle Jurassic
-
Bajocian (1)
-
-
Twin Creek Limestone (1)
-
Upper Jurassic
-
Arab Formation (1)
-
Bossier Formation (1)
-
Haynesville Formation (1)
-
Kimmeridgian (1)
-
La Casita Formation (1)
-
Oxfordian (2)
-
Smackover Formation (1)
-
Tithonian (1)
-
-
-
Triassic
-
Lower Triassic
-
Permian-Triassic boundary (5)
-
Smithian (1)
-
Thaynes Formation (1)
-
-
Middle Triassic (1)
-
Moenkopi Formation (2)
-
Upper Triassic
-
Carnian (1)
-
Keuper (1)
-
Yanchang Formation (4)
-
-
-
upper Mesozoic (4)
-
Yanshanian (4)
-
-
Paleozoic
-
Acatlan Complex (1)
-
Berea Sandstone (2)
-
Cambrian
-
Acadian (1)
-
Lower Cambrian (2)
-
Middle Cambrian
-
Burgess Shale (3)
-
-
Upper Cambrian
-
Copper Ridge Dolomite (1)
-
-
-
Carboniferous
-
Benxi Formation (2)
-
Lower Carboniferous
-
Dinantian (1)
-
-
Mississippian
-
Barnett Shale (1)
-
Lower Mississippian
-
Osagian
-
Burlington Limestone (1)
-
Keokuk Limestone (1)
-
-
-
Middle Mississippian
-
Visean (1)
-
-
Upper Mississippian
-
Serpukhovian (2)
-
-
-
Pennsylvanian
-
Conemaugh Group (1)
-
Lower Pennsylvanian
-
Bashkirian (1)
-
-
Middle Pennsylvanian
-
Atokan (1)
-
Carbondale Formation (1)
-
Desmoinesian (1)
-
Paradox Formation (1)
-
Tradewater Formation (1)
-
-
Monongahela Group (1)
-
Upper Pennsylvanian
-
Missourian (1)
-
Virgilian
-
Plattsmouth Limestone Member (1)
-
-
-
-
Upper Carboniferous (5)
-
-
Devonian
-
Lower Devonian
-
Oriskany Sandstone (1)
-
-
Middle Devonian
-
Dundee Limestone (1)
-
Marcellus Shale (2)
-
-
Upper Devonian
-
Chemung Formation (1)
-
Frasnian (1)
-
-
Waterways Formation (1)
-
-
Dunkard Group (1)
-
Helderberg Group (1)
-
Knox Group (2)
-
lower Paleozoic
-
Cape Phillips Formation (1)
-
-
middle Paleozoic (1)
-
Ordovician
-
Lower Ordovician
-
Saint George Group (2)
-
Tremadocian (2)
-
-
Majiagou Formation (1)
-
Middle Ordovician
-
Cloridorme Formation (1)
-
-
Trenton Group (1)
-
Upper Ordovician
-
Ashgillian (1)
-
Cincinnatian (3)
-
Katian (3)
-
Kope Formation (1)
-
Red River Formation (1)
-
Sandbian (1)
-
-
-
Paganzo Group (1)
-
Permian
-
Cutler Formation (2)
-
Kaibab Formation (1)
-
Lower Permian
-
Leonardian (1)
-
Wolfcampian (1)
-
-
Maokou Formation (1)
-
Meade Peak Member (1)
-
Park City Formation (2)
-
Retort Phosphatic Shale Member (1)
-
Upper Permian
-
Permian-Triassic boundary (5)
-
Raniganj Formation (1)
-
Salado Formation (1)
-
Zechstein (1)
-
-
-
Petersburg Granite (1)
-
Sauk Sequence (1)
-
Silurian
-
Lower Silurian
-
Brassfield Formation (1)
-
Llandovery (1)
-
-
Middle Silurian
-
Clinton Group (1)
-
-
Upper Silurian (1)
-
-
Taiyuan Formation (1)
-
upper Paleozoic
-
Shanxi Formation (1)
-
-
-
Phanerozoic (9)
-
Precambrian
-
Adirondack Anorthosite (1)
-
Archean
-
Blake River Group (1)
-
Mesoarchean (2)
-
Neoarchean (2)
-
-
Chuanlinggou Formation (1)
-
Chuar Group (1)
-
Hazel Formation (1)
-
Johnnie Formation (1)
-
Purcell System (1)
-
Transvaal Supergroup (1)
-
upper Precambrian
-
Proterozoic
-
Athabasca Formation (1)
-
Banxi Group (1)
-
Mesoproterozoic (6)
-
Neoproterozoic
-
Cryogenian (1)
-
Dengying Formation (2)
-
Doushantuo Formation (1)
-
Ediacaran (10)
-
Riphean (1)
-
Vendian (1)
-
-
Paleoproterozoic
-
Rustenburg Layered Suite (2)
-
-
Pretoria Group (1)
-
Sinian
-
Dengying Formation (2)
-
Doushantuo Formation (1)
-
-
-
-
-
Vindhyan (1)
-
-
igneous rocks
-
agglutinates (1)
-
igneous rocks
-
carbonatites (2)
-
kimberlite (3)
-
plutonic rocks
-
anorthosite (2)
-
appinite (1)
-
diabase (3)
-
diorites
-
quartz diorites (1)
-
tonalite (4)
-
-
gabbros (5)
-
granites
-
A-type granites (3)
-
charnockite (3)
-
granite porphyry (1)
-
I-type granites (1)
-
leucogranite (2)
-
monzogranite (3)
-
muscovite granite (1)
-
-
granodiorites
-
granodiorite porphyry (1)
-
-
monzonites (1)
-
pegmatite (4)
-
quartz monzonite (1)
-
syenites (2)
-
ultramafics
-
peridotites
-
dunite (1)
-
garnet peridotite (1)
-
harzburgite (1)
-
-
pyroxenite
-
garnet pyroxenite (1)
-
orthopyroxenite (1)
-
-
-
-
porphyry (3)
-
volcanic rocks
-
adakites (1)
-
andesites (4)
-
basalts
-
alkali basalts
-
alkali olivine basalt (1)
-
hawaiite (1)
-
-
mid-ocean ridge basalts (1)
-
ocean-island basalts (1)
-
tholeiite (1)
-
-
dacites (3)
-
glasses
-
obsidian (1)
-
volcanic glass (1)
-
-
nephelinite (1)
-
phonolites (1)
-
pyroclastics
-
ash-flow tuff (1)
-
ignimbrite (2)
-
tuff (5)
-
welded tuff (1)
-
-
rhyolites (4)
-
trachyandesites (2)
-
-
-
ophiolite (5)
-
pyrolite (1)
-
volcanic ash (2)
-
-
metamorphic rocks
-
metabentonite (1)
-
metamorphic rocks
-
amphibolites (2)
-
cataclasites (2)
-
eclogite (2)
-
gneisses
-
augen gneiss (1)
-
biotite gneiss (1)
-
granite gneiss (2)
-
orthogneiss (3)
-
paragneiss (1)
-
-
granulites (2)
-
marbles (2)
-
metacarbonate rocks (1)
-
metaigneous rocks
-
metabasite (1)
-
metagranite (1)
-
-
metasedimentary rocks
-
metapelite (2)
-
paragneiss (1)
-
-
metasomatic rocks
-
skarn (2)
-
-
metavolcanic rocks (1)
-
migmatites (2)
-
mylonites
-
pseudotachylite (1)
-
ultramylonite (2)
-
-
quartzites (2)
-
schists
-
blueschist (1)
-
-
slates (1)
-
-
ophiolite (5)
-
turbidite (2)
-
-
meteorites
-
meteorites
-
Northwest Africa Meteorites (1)
-
stony meteorites
-
achondrites
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eucrite (1)
-
lunar meteorites (1)
-
Martian meteorites (2)
-
-
chondrites
-
carbonaceous chondrites (1)
-
ordinary chondrites
-
L chondrites (1)
-
-
-
-
-
-
minerals
-
alloys
-
carbides (1)
-
-
antimonates (1)
-
arsenates
-
scorodite (2)
-
-
arsenides
-
arsenopyrite (4)
-
cobaltite (1)
-
gersdorffite (1)
-
-
arsenites (1)
-
carbonates
-
ankerite (1)
-
aragonite (1)
-
calcite (13)
-
cerussite (1)
-
dolomite (5)
-
magnesite (1)
-
smithsonite (1)
-
-
halides
-
chlorides
-
halite (1)
-
sylvite (1)
-
-
fluorides
-
fluorite (1)
-
humite (1)
-
-
-
hydrates (1)
-
iron minerals (1)
-
metabentonite (1)
-
minerals (12)
-
native elements
-
diamond (1)
-
graphite (2)
-
-
oxalates (1)
-
oxides
-
anatase (1)
-
birnessite (1)
-
brucite (1)
-
chromite (1)
-
corundum (2)
-
diaspore (1)
-
ferrihydrite (5)
-
goethite (2)
-
hematite (3)
-
hercynite (2)
-
hibonite (1)
-
hydroxides
-
aluminum hydroxides (1)
-
oxyhydroxides (2)
-
-
ilmenite (2)
-
iron oxides (9)
-
magnetite (8)
-
manganese oxides (2)
-
periclase (3)
-
perovskite (6)
-
rutile (4)
-
sapphire (3)
-
senarmontite (1)
-
spinel (3)
-
spinel group (2)
-
tantalates
-
microlite (1)
-
-
uraninite (1)
-
wustite (1)
-
-
phosphates
-
apatite (89)
-
autunite (1)
-
chlorapatite (1)
-
fluorapatite (2)
-
hydroxylapatite (1)
-
monazite (4)
-
vivianite (1)
-
xenotime (1)
-
-
platinum minerals (1)
-
selenides (1)
-
silicates
-
aluminosilicates (1)
-
asbestos (1)
-
chain silicates
-
amphibole group
-
clinoamphibole
-
grunerite (1)
-
hornblende (3)
-
tremolite (2)
-
tschermakite (1)
-
-
orthoamphibole
-
holmquistite (1)
-
-
-
pyroxene group
-
clinopyroxene
-
diopside (4)
-
-
orthopyroxene
-
protoenstatite (1)
-
-
-
-
framework silicates
-
feldspar group
-
alkali feldspar
-
K-feldspar (2)
-
microcline (1)
-
-
plagioclase
-
albite (1)
-
anorthite (3)
-
-
-
nepheline group
-
nepheline (1)
-
-
silica minerals
-
chalcedony (1)
-
jasper (1)
-
quartz (15)
-
stishovite (1)
-
tridymite (2)
-
-
sodalite group
-
sodalite (1)
-
-
zeolite group (3)
-
-
orthosilicates
-
nesosilicates
-
garnet group
-
almandine (1)
-
andradite (2)
-
grossular (2)
-
melanite (1)
-
pyrope (1)
-
-
humite (1)
-
kyanite (1)
-
olivine group
-
forsterite (2)
-
olivine (8)
-
-
sillimanite (2)
-
titanite group
-
titanite (2)
-
-
uranophane (1)
-
zircon group
-
zircon (82)
-
-
-
sorosilicates
-
lawsonite (2)
-
melilite group (1)
-
-
-
ring silicates
-
beryl (2)
-
cordierite (2)
-
milarite group
-
milarite (1)
-
-
tourmaline group
-
dravite (2)
-
-
-
sheet silicates
-
cerolite (1)
-
chlorite group
-
chlorite (5)
-
-
clay minerals
-
allophane (1)
-
beidellite (1)
-
hectorite (2)
-
imogolite (1)
-
kaolinite (5)
-
montmorillonite (8)
-
nontronite (2)
-
saponite (1)
-
smectite (13)
-
stevensite (2)
-
vermiculite (2)
-
-
illite (12)
-
mica group
-
biotite (4)
-
glauconite (1)
-
muscovite (4)
-
phengite (2)
-
phlogopite (1)
-
-
palygorskite (2)
-
sepiolite (2)
-
sericite (1)
-
serpentine group
-
antigorite (1)
-
chrysotile (1)
-
serpentine (2)
-
-
-
-
sulfates
-
alum (1)
-
alunite (2)
-
barite (2)
-
celestine (1)
-
epsomite (1)
-
gypsum (5)
-
hexahydrite (1)
-
jarosite (2)
-
melanterite (2)
-
polyhalite (1)
-
rozenite (1)
-
selenite (1)
-
thenardite (1)
-
-
sulfides
-
arsenopyrite (4)
-
bornite (1)
-
chalcopyrite (2)
-
cobaltite (1)
-
cooperite (1)
-
copper sulfides (1)
-
gersdorffite (1)
-
greigite (1)
-
iron sulfides (2)
-
molybdenite (3)
-
pyrite (10)
-
pyrrhotite (3)
-
sphalerite (4)
-
stibnite (2)
-
-
sulfosalts
-
sulfantimonites
-
tetrahedrite (1)
-
-
-
tellurates (2)
-
tellurides
-
altaite (1)
-
-
tellurites (2)
-
tungstates
-
ferberite (1)
-
scheelite (2)
-
-
uranium minerals (1)
-
vanadates (2)
-
-
Primary terms
-
absolute age (125)
-
Africa
-
Central Africa
-
Congo Democratic Republic
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Shaba Congo Democratic Republic (1)
-
-
-
East Africa
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Kenya (2)
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Madagascar (1)
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North Africa
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-
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Egypt
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Nile Delta (2)
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Libya
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-
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Morocco
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Tunisia (1)
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Sahara (1)
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Southern Africa
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South Africa
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Bushveld Complex (2)
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Zimbabwe (2)
-
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West Africa
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Benin (1)
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Niger Delta (2)
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Senegal (1)
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West African Craton (1)
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Antarctica
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Victoria Land
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McMurdo dry valleys (1)
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Arctic Ocean
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Arctic region
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Asia
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Altai Mountains
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Amur Russian Federation
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Arabian Peninsula
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Central Asia
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-
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-
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Far East
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Borneo
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Burma (1)
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China
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Altyn Tagh Fault (1)
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Loess Plateau (1)
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Shandong China
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Xizang China
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Indochina (1)
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Japan
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Leg 146
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chi-square tests
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Journal Article
Use of the chi-square test for the analysis of orientation data
Journal: Journal of Sedimentary Research
Publisher: SEPM Society for Sedimentary Geology
Published: 01 September 1979
Journal of Sedimentary Research (1979) 49 (3): 773–776.
...C. K. Ballantyne; R. Cornish Abstract The chi-square test has been extensively employed by geologists and geomorphologists as a measure of the strength or statistical significance of preferred trends within orientation data. The x 2 value obtained is dependent on arbitrary selection of the pattern...
Image
Histograms for comparisons used in Chi-square tests of independence for A) ...
in HYDRODYNAMIC BEHAVIORS OF PACHYCEPHALOSAURID DOMES IN CONTROLLED FLUVIAL SETTINGS: A CASE STUDY IN EXPERIMENTAL DINOSAUR TAPHONOMY
> PALAIOS
Published: 01 May 2013
FIGURE 5— Histograms for comparisons used in Chi-square tests of independence for A) Stegoceras and Hanssuesia domes, comparing shape with upstream orientation and B) resting orientations versus shape; C) Pachycephalosaurus and Hanssuesia domes, comparing shape with upstream orientation
Image
Table 3. Results of chi-square tests comparing empirical FAD and LAD frequ...
in Faunal turnover rates and mammalian biodiversity of the late Pliocene and Pleistocene of eastern Africa
> Paleobiology
Published: 01 January 2001
Table 3. Results of chi-square tests comparing empirical FAD and LAD frequencies with mean simulated frequencies of a constant-turnover model and of pulsed models in which the background turnover rate was increased by three times and five times during two turnover pulses
Image
RESULTS OF CHI SQUARE TESTS
in Analysis of Fracture Trace Pattern of Adak and Kagalaska Islands, Alaska: GEOLOGICAL NOTES
> AAPG Bulletin
Published: 01 February 1961
T able I. RESULTS OF CHI SQUARE TESTS
Image
TABLE 2 —Results of Chi-square test of several biostratinomic variables for...
in TAPHONOMY OF VERTEBRATE FOSSIL ASSEMBLAGES FROM SWAMPY CIRCUM-LAKE ENVIRONMENTS: AN EXAMPLE FROM THE LATE EOCENE OF ZAMBRANA (IBERIAN PENINSULA)
> PALAIOS
Published: 01 January 2009
TABLE 2 —Results of Chi-square test of several biostratinomic variables for two vertebrate fossil assemblages
Image
Values for the maximum likelihood (ML) chi-square test and log odds ratio. ...
in The Pull of the Recent revisited: negligible species-level effect in a regional marine fossil record
> Paleobiology
Published: 01 November 2020
Table 2. Values for the maximum likelihood (ML) chi-square test and log odds ratio. Calculated from 2 × 2 contingency tables of traits of extant species that have a fossil record within or missing from Nukumaruan (2.4 Ma) and Castlecliffian (1.63 Ma) to recent. None of the p- values
Image
Results of ANOVA and Chi-squared tests for combined fern and seed fern grou...
in TAPHONOMIC VARIANCE BETWEEN MARATTIALEAN FERNS AND MEDULLOSAN SEED FERNS IN THE CARBONIFEROUS MAZON CREEK LAGERSTÄTTE, ILLINOIS, USA
> PALAIOS
Published: 01 March 2016
Table 3.— Results of ANOVA and Chi-squared tests for combined fern and seed fern groups. Significant p-values (α = 0.05) shown in bold .
Image
Chi-square test ρ values for comparisons of the distribution of specific da...
in THE IMPACT OF HIGH-ENERGY STORMS ON SHALLOW-WATER NAUTILUS (CEPHALOPODA) TAPHONOMY, LIFOU (LOYALTY ISLANDS)
> PALAIOS
Published: 01 July 2014
Table 6.— Chi-square test ρ values for comparisons of the distribution of specific damage and encrustation levels, shell wear, and organism maturity in Nautilus assemblages from Bays 1–3 and the 2008 collection. Bold values indicate that the assemblage is significantly different (ρ < 0.05).
Image
ETAS model parameter estimates, log-likelihood, AIC and chi-square test res...
in Statistical models in seismology: Lesser Antilles arc case
> Bulletin de la Société Géologique de France
Published: 01 January 2013
Table II ETAS model parameter estimates, log-likelihood, AIC and chi-square test results for four triggering functions. Γ ( p ) stands for the value at point p of the Gamma function.
Image
Results of chi-squared test of thickness ratios of shell whorls for Damesit...
in Different Modes of Migration Among Late Cretaceous Ammonoids in Northwestern Hokkaido, Japan: Evidence from the Analyses of Shell Whorls
> Journal of Paleontology
Published: 01 July 2012
T able 2 Results of chi-squared test of thickness ratios of shell whorls for Damesites sugata in the intervals with different shell diameters. N = number of specimens; SD = standard deviations; DF = the degrees of freedom; ns = not significant ( P >0.05).
Image
Results of chi-squared test of ammonitella diameters for Damesites sugata, ...
in Different Modes of Migration Among Late Cretaceous Ammonoids in Northwestern Hokkaido, Japan: Evidence from the Analyses of Shell Whorls
> Journal of Paleontology
Published: 01 July 2012
T able 3 Results of chi-squared test of ammonitella diameters for Damesites sugata, Hypophylloceras subramosum, and Gaudryceras tenuiliratum. N = number of specimens; SD = standard deviations; DF = the degrees of freedom; ns = not significant ( P >0.05).
Image
Table 1. Chi-squared tests of distribution of fish species in the functiona...
Published: 01 August 2010
Table 1. Chi-squared tests of distribution of fish species in the functional morphospace biplot. “Total” refers to distribution across all four quadrants, “Orbit grad.” to distribution between the upper and lower halves and “LJ grad.” to distribution between the left and right halves. The expected
Image
Table 4. Results of chi-square test of observed versus expected endoskeleto...
in ECOLOGICAL INTERACTIONS BETWEEN RHIPIDOMELLA (ORTHIDES, BRACHIOPODA) AND ITS ENDOSKELETOBIONTS AND PREDATORS FROM THE MIDDLE DEVONIAN DUNDEE FORMATION OF OHIO, UNITED STATES
> PALAIOS
Published: 01 January 2010
Table 4. Results of chi-square test of observed versus expected endoskeletobiont and predation trace occurrences. A p -value < 0.05 indicates either more or less biological activity in that shell region than expected, as indicated.
Image
TABLE 2—Chi-square test contingency tables for water pH, the du ration of a...
in Lacustrine Fossil Preservation in Acidic Environments: Implications of Experimental and Field Studies for the Cretaceous–Paleogene Boundary Acid Rain Trauma
> PALAIOS
Published: 01 August 2005
TABLE 2—Chi-square test contingency tables for water pH, the du ration of acid treatment, burial depth, and acid-buffering capacity. The tables test the null hypothesis that the experimental variable is inde pendent of carapace recovery
Image
Age spectra of the subpopulations passing the chi-square test. The euhedral...
in Combination of Single-Grain Fission-Track Chronology and Morphological Analysis of Detrital Zircon Crystals in Provenance Studies: Sources of the Macigno Formation (Apennines, Italy)
> Journal of Sedimentary Research
Published: 01 July 2001
Figure 7 Age spectra of the subpopulations passing the chi-square test. The euhedral and rounded aliquots gave nearly identical subpopulations.
Image
Ages of the crystal populations grouped according to the chi-square test. P...
in Combination of Single-Grain Fission-Track Chronology and Morphological Analysis of Detrital Zircon Crystals in Provenance Studies: Sources of the Macigno Formation (Apennines, Italy)
> Journal of Sedimentary Research
Published: 01 July 2001
Table 2 Ages of the crystal populations grouped according to the chi-square test. P(Χ 2 ) is the probability of obtaining Χ 2 value for n degrees of freedom (where n = no. of crystals − 1; Galbraith 1981 ). The "binomfit" populations were determined by Mark Brandon's computer program. The two
Image
Table 3. Summary statistics of contingency tables testing the independence...
Published: 01 January 2001
Table 3. Summary statistics of contingency tables testing the independence of extinction with regard to taxonomy. df represents degrees of freedom in chi-squared tests; p represents significance level found with chi-squared test; F represents significance level found with Fisher's exact test
Journal Article
QUANTITATIVE SLOPE ANALYSIS
Journal: GSA Bulletin
Publisher: Geological Society of America
Published: 01 May 1956
GSA Bulletin (1956) 67 (5): 571–596.
... of sampling points by drawing random pairs of rectangular coordinates; (2) use of sampling points uniformly spaced on a rectangular grid. A test area of about 1 square mile was selected near the center of the Emporium, Pennsylvania, topographic quadrangle. Population parameters of tangent of slope were...
Journal Article
The mechanics of locating earthquakes
Publisher: Seismological Society of America
Published: 01 February 1976
Bulletin of the Seismological Society of America (1976) 66 (1): 173–187.
... errors of the parameters. The location parameters are found to be distributed as one minus chi squared with m degrees of freedom, where m is the number of parameters, allowing the simple construction of confidence levels. The use of the chi-squared test with n-m degrees of freedom, where n is the number...
Journal Article
Determination of Flow Direction of Rhyolitic Ash-Flow Tuffs from Fluidal Textures
Journal: GSA Bulletin
Publisher: Geological Society of America
Published: 01 November 1970
GSA Bulletin (1970) 81 (11): 3393–3406.
... primary flowage. The statistical significance of results is documented by the Tukey Chi-square test and the vector method. Statistical parameters for these two techniques were calculated by Fortran IV program. Only seven samples (9 percent) indicated Chi-square values below the 90 percent confidence limit...
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