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all geography including DSDP/ODP Sites and Legs
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Alexander Terrane (1)
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Arctic region
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Svalbard
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Spitsbergen
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Ny Friesland (1)
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Asia
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Canada
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Lake District (7)
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North America
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Prince of Wales Island (1)
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South America
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Argentina
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United States
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Nevada
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commodities
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petroleum (1)
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elements, isotopes
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carbon
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isotope ratios (1)
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C-13/C-12 (1)
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O-18/O-16 (1)
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Sr-87/Sr-86 (1)
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metals
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alkaline earth metals
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strontium
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Sr-87/Sr-86 (1)
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rare earths (3)
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oxygen
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O-18/O-16 (1)
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fossils
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borings (1)
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Graptolithina
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Graptoloidea
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Didymograptina
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Didymograptus (1)
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ichnofossils
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Thalassinoides (1)
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Invertebrata
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Arthropoda
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Trilobitomorpha
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Trilobita
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Odontopleurida (1)
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Phacopida
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Phacopina (1)
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Ptychopariida
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Asaphidae (2)
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Olenidae (1)
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Brachiopoda
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Articulata
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Orthida (3)
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Inarticulata (1)
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Echinodermata
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Asterozoa
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Stelleroidea
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Asteroidea (1)
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Somasteroidea (1)
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Crinozoa
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Crinoidea (1)
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Homalozoa
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Stylophora (1)
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Mollusca
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Bivalvia (1)
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Gastropoda (1)
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Monoplacophora (1)
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Porifera (1)
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Protista (1)
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microfossils
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Chitinozoa (5)
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Conodonta (3)
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palynomorphs
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acritarchs (6)
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Chitinozoa (5)
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Plantae (1)
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geochronology methods
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geologic age
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Dalradian (1)
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Paleozoic
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Cambrian
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Upper Cambrian (1)
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Cow Head Group (1)
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lower Paleozoic (1)
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Ordovician
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Buchans Group (1)
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Davidsville Group (1)
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Gualcamayo Formation (1)
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Lower Ordovician
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Arenigian (19)
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Tremadocian (8)
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Lushs Bight Group (1)
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Middle Ordovician
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Llandeilian (12)
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Llanvirnian (52)
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Table Head Group (1)
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Whiterockian (3)
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Skiddaw Slates (4)
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Upper Ordovician
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Ashgillian (8)
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Caradocian
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Borrowdale Volcanic Group (1)
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Road River Formation (1)
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Silurian (1)
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Phanerozoic (1)
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Precambrian (1)
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igneous rocks
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igneous rocks
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plutonic rocks
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diabase (1)
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diorites
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tonalite (1)
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gabbros (1)
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granites (1)
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volcanic rocks
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andesites (1)
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basalts
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mid-ocean ridge basalts (2)
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dacites (1)
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rhyolites (2)
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ophiolite (1)
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metamorphic rocks
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K-bentonite (1)
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metamorphic rocks
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metasedimentary rocks (1)
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ophiolite (1)
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turbidite (2)
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minerals
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carbonates
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calcite (1)
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K-bentonite (1)
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phosphates
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monazite (1)
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silicates
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orthosilicates
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nesosilicates
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titanite group
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titanite (1)
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zircon group
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zircon (1)
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sheet silicates
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mica group (1)
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sulfides
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pyrite (1)
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Primary terms
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absolute age (4)
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Arctic region
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Svalbard
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Spitsbergen
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Spitsbergen Island
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Ny Friesland (1)
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Asia
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Arabian Peninsula
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Saudi Arabia (1)
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Far East
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Korea (1)
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Atlantic Ocean (1)
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Atlantic region (1)
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Australasia
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Australia
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Victoria Australia (1)
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biogeography (3)
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Canada
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Eastern Canada
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Gander Zone (2)
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Newfoundland and Labrador
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Newfoundland (7)
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Quebec
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Levis County Quebec (1)
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Western Canada
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British Columbia (1)
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carbon
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C-13/C-12 (1)
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data processing (1)
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deformation (2)
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diagenesis (3)
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Europe
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Baltic region
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Estonia (1)
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Central Europe
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Czech Republic
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Bohemia
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Prague Czech Republic (1)
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Fennoscandia (1)
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Leningrad Oblast Russian Federation
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Southern Europe
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Iberian Peninsula
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Portugal (1)
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Tornquist-Teisseyre Zone (1)
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Western Europe
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France
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Armorican Massif (1)
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Galway Ireland
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Scandinavia
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United Kingdom
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South-West England (1)
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Scotland
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Ayrshire Scotland
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Girvan Scotland (2)
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Scottish Highlands (1)
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Wales
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Gwynedd Wales
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Arenig (1)
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Merionethshire Wales
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Arenig (1)
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Pembrokeshire Wales
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Pembroke Wales (1)
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Welsh Basin (3)
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faults (2)
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folds (3)
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geochemistry (4)
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geochronology (1)
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Graptolithina
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Graptoloidea
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Didymograptina
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Didymograptus (1)
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-
-
-
ichnofossils
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Thalassinoides (1)
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-
igneous rocks
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plutonic rocks
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diabase (1)
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diorites
-
tonalite (1)
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-
gabbros (1)
-
granites (1)
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-
volcanic rocks
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andesites (1)
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basalts
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mid-ocean ridge basalts (2)
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dacites (1)
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rhyolites (2)
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-
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inclusions
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fluid inclusions (1)
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intrusions (3)
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Invertebrata
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Arthropoda
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Trilobitomorpha
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Trilobita
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Odontopleurida (1)
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Phacopida
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Phacopina (1)
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-
Ptychopariida
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Asaphidae (2)
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Olenidae (1)
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-
-
-
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Brachiopoda
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Articulata
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Orthida (3)
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Inarticulata (1)
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Echinodermata
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Asterozoa
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Stelleroidea
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Asteroidea (1)
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Somasteroidea (1)
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Crinozoa
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Crinoidea (1)
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Homalozoa
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Stylophora (1)
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Mollusca
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Bivalvia (1)
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Gastropoda (1)
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Monoplacophora (1)
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Porifera (1)
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Protista (1)
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isotopes
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stable isotopes
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C-13/C-12 (1)
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O-18/O-16 (1)
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Sr-87/Sr-86 (1)
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magmas (1)
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metals
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alkaline earth metals
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strontium
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Sr-87/Sr-86 (1)
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rare earths (3)
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metamorphic rocks
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metasedimentary rocks (1)
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metamorphism (1)
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North America
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Appalachians
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Northern Appalachians (2)
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Humber Zone (1)
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orogeny (2)
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oxygen
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O-18/O-16 (1)
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paleobotany (1)
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paleoclimatology (1)
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paleoecology (7)
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paleogeography (2)
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paleomagnetism (1)
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paleontology (8)
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Paleozoic
-
Cambrian
-
Upper Cambrian (1)
-
-
Cow Head Group (1)
-
Devonian
-
Upper Devonian
-
Frasnian (1)
-
-
-
lower Paleozoic (1)
-
Ordovician
-
Buchans Group (1)
-
Davidsville Group (1)
-
Gualcamayo Formation (1)
-
Lower Ordovician
-
Arenigian (19)
-
Tremadocian (8)
-
-
Lushs Bight Group (1)
-
Middle Ordovician
-
Llandeilian (12)
-
Llanvirnian (52)
-
Table Head Group (1)
-
Whiterockian (3)
-
-
Skiddaw Slates (4)
-
Upper Ordovician
-
Ashgillian (8)
-
Caradocian
-
Borrowdale Volcanic Group (1)
-
-
-
-
Road River Formation (1)
-
Silurian (1)
-
-
palynomorphs
-
acritarchs (6)
-
Chitinozoa (5)
-
-
petroleum (1)
-
petrology (1)
-
Phanerozoic (1)
-
Plantae (1)
-
plate tectonics (1)
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Precambrian (1)
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sea-level changes (1)
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sedimentary petrology (1)
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sedimentary rocks
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carbonate rocks
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wackestone (1)
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clastic rocks
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bentonite (1)
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black shale (1)
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sandstone (2)
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siltstone (1)
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-
South America
-
Argentina
-
La Rioja Argentina (1)
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San Juan Argentina (1)
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Precordillera (3)
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stratigraphy (17)
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structural geology (1)
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tectonics (4)
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United States
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Alabama (1)
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Alaska (1)
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Nevada
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Elko County Nevada (1)
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Pilot Range (1)
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Tennessee (1)
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Utah
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Millard County Utah (1)
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rock formations
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San Juan Formation (1)
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sedimentary rocks
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sedimentary rocks
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carbonate rocks
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wackestone (1)
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clastic rocks
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bentonite (1)
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black shale (1)
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sandstone (2)
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siltstone (1)
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turbidite (2)
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sedimentary structures
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borings (1)
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sediments
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turbidite (2)
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Llanvirnian
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Journal Article
Geochemistry and diagenetic history of the Ordovician Lower Head Formation sandstones, western Newfoundland, Canada
Journal: Canadian Journal of Earth Sciences
Publisher: Canadian Science Publishing
Published: 28 June 2016
Canadian Journal of Earth Sciences (2016) 53 (12): 1501–1510.
Journal Article
A re-appraisal of the petrogenesis and tectonic setting of the Ordovician Fishguard Volcanic Group, SW Wales
Journal: Geological Magazine
Publisher: Cambridge University Press
Published: 28 July 2015
Geological Magazine (2016) 153 (3): 410–425.
Journal Article
Description and ecology of a new Middle Ordovician (Llanvirn) odontopleurid trilobite from the Builth Inlier of Mid-Wales, with a review of the genus Meadowtownella
Journal: Geological Magazine
Publisher: Cambridge University Press
Published: 09 August 2011
Geological Magazine (2012) 149 (3): 397–411.
Journal Article
Tunneling trilobites: Habitual infaunalism in an Ordovician carbonate seafloor
Journal: Geology
Publisher: Geological Society of America
Published: 01 August 2006
Geology (2006) 34 (8): 657–660.
Journal Article
Mid–Late Ordovician magmatism and metamorphism along the Gander margin in central Newfoundland
Journal: Journal of the Geological Society
Publisher: Geological Society of London
Published: 01 March 2006
Journal of the Geological Society (2006) 163 (2): 347–362.
Journal Article
TRIARTHRINID TRILOBITES (OLENIDAE) FROM THE MIDDLE AND UPPER ORDOVICIAN, PRECORDILLERA OF ARGENTINA
Journal: Journal of Paleontology
Publisher: Paleontological Society
Published: 01 January 2005
Journal of Paleontology (2005) 79 (1): 89–109.
Journal Article
Heavy minerals solve structural and stratigraphic problems in Ordovician strata of the western Irish Caledonides
Journal: Geological Magazine
Publisher: Cambridge University Press
Published: 01 January 2003
Geological Magazine (2003) 140 (1): 25–30.
Journal Article
Epizoan-sponge Interactions in the Early Ordovician of the Argentine Precordillera
Journal: PALAIOS
Publisher: SEPM Society for Sedimentary Geology
Published: 01 August 2000
PALAIOS (2000) 15 (4): 261–272.
Journal Article
MORPHOLOGICAL AND PALEOECOLGICAL ANALYSIS OF THE ORDOVICIAN ANKYROID LAGYNOCYSTIS (STYLOPHORA: ECHINODERMATA)
Journal: Journal of Paleontology
Publisher: Paleontological Society
Published: 01 March 2000
Journal of Paleontology (2000) 74 (2): 254–262.
Journal Article
Interpretations of SHRIMP and isotope dilution zircon ages for the geological time-scale: 1. The early Ordovician and late Cambrian
Journal: Mineralogical Magazine
Published: 01 February 2000
Mineralogical Magazine (2000) 64 (1): 43–57.
Journal Article
Age of the Grampian orogeny in Scotland and Ireland
Journal: Journal of the Geological Society
Publisher: Geological Society of London
Published: 01 December 1999
Journal of the Geological Society (1999) 156 (6): 1231–1236.
Journal Article
Ordovician pliomerid and prosopiscid trilobites from Argentina
Journal: Journal of Paleontology
Publisher: Paleontological Society
Published: 01 November 1999
Journal of Paleontology (1999) 73 (6): 1144–1154.
Journal Article
Ontogenetic changes of Bacculae in Korean asaphid trilobites and their taxonomic implications
Journal: Journal of Paleontology
Publisher: Paleontological Society
Published: 01 November 1999
Journal of Paleontology (1999) 73 (6): 1210–1213.
Journal Article
A petrographic approach for evaluating trace-element mobility in a black shale
Journal: Journal of Sedimentary Research
Publisher: SEPM Society for Sedimentary Geology
Published: 01 September 1998
Journal of Sedimentary Research (1998) 68 (5): 970–980.
Journal Article
Early phylogeny and subclass division of the Crinoidea (Phylum Echinodermata)
Journal: Journal of Paleontology
Publisher: Paleontological Society
Published: 01 May 1998
Journal of Paleontology (1998) 72 (3): 499–510.
Journal Article
Recognition of the Trans-European suture zone (TESZ) by the palaeobiogeographical distribution pattern of early to middle Ordovician
Journal: Geological Magazine
Publisher: Cambridge University Press
Published: 01 September 1997
Geological Magazine (1997) 134 (5): 617–625.
Journal Article
Arenig biostratigraphy of the Pointe-de-Lévy slice, Quebec Appalachians, Canada
Journal: Canadian Journal of Earth Sciences
Publisher: Canadian Science Publishing
Published: 01 June 1997
Canadian Journal of Earth Sciences (1997) 34 (6): 733–752.
Journal Article
Discussion on a revision of Ordovician series and stage division from historical type area
M. G. Bassett, R. M. Owens, R. A. Fortey, D. A. T. Harper, J. K. Ingham, A. W. Owen, A. W. A. Rushton
Journal: Geological Magazine
Publisher: Cambridge University Press
Published: 01 November 1996
Geological Magazine (1996) 133 (6): 767–772.
Journal Article
Calibrating the Ordovician radiation of marine life; implications for Phanerozoic diversity trends
Journal: Paleobiology
Publisher: Paleontological Society
Published: 01 April 1996
Paleobiology (1996) 22 (2): 304–309.
Journal Article
New evidence for land plants from the lower Middle Ordovician of Saudi Arabia
Journal: Geology
Publisher: Geological Society of America
Published: 01 January 1996
Geology (1996) 24 (1): 55–58.