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NARROW
Format
Article Type
Journal
Publisher
Section
GeoRef Subject
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all geography including DSDP/ODP Sites and Legs
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Arctic region
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Greenland
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East Greenland (1)
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Svalbard
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Spitsbergen
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Nordaustlandet (1)
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Spitsbergen Island
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Ny Friesland (1)
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Arran (3)
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Asia
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Far East
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Taiwan (1)
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Himalayas (1)
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Atlantic Ocean
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North Atlantic (2)
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Atlantic Ocean Islands
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Shetland Islands
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Unst (1)
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Atlantic region (1)
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Australasia
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New Zealand (1)
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Avalon Zone (1)
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Caledonides (39)
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Canada
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Eastern Canada
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Maritime Provinces
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Newfoundland and Labrador
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Labrador (1)
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Europe
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Western Europe
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Ballachulish Complex (1)
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Ireland
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Donegal Ireland
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Ardara Pluton (1)
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Galway Ireland
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Connemara (25)
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Galway Granite (1)
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Mayo Ireland (14)
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Sligo Ireland (1)
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Tipperary Ireland
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Cashel Ireland (2)
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-
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United Kingdom
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English Channel Islands (1)
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Great Britain
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Scotland
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Aberdeenshire Scotland
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Aberdeen Scotland (1)
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Huntly Scotland (1)
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Angus Scotland (1)
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Argyllshire Scotland
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Islay (6)
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Jura Island (1)
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Ayrshire Scotland (1)
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Banffshire Scotland (2)
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Dundee Scotland (1)
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Firth of Clyde (1)
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Glasgow Scotland (2)
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Great Glen Fault (3)
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Hebrides
-
Inner Hebrides
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Islay (6)
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Isle of Skye (1)
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Jura Island (1)
-
-
-
Highland region Scotland
-
Inverness-shire Scotland
-
Inverness Scotland (1)
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Isle of Skye (1)
-
-
-
Moine thrust zone (3)
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Perthshire Scotland
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Aberfeldy (2)
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Scottish Highlands
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Grampian Highlands (24)
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Scottish Northern Highlands (4)
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Shetland Islands
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Unst (1)
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-
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Wales
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Anglesey Wales (1)
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-
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Northern Ireland
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Londonderry Northern Ireland (1)
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Tyrone Northern Ireland (2)
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-
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-
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Highland Boundary Fault (16)
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Loch Lomond (1)
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Midland Valley (11)
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North America
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Appalachians
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Northern Appalachians (2)
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Canadian Shield
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Grenville Province (3)
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-
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Northern Highlands (3)
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Pacific region
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Pacific mobile belt (1)
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Southern Uplands (4)
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commodities
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barite deposits (3)
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coal deposits (1)
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feldspar deposits (1)
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metal ores
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base metals (1)
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gold ores (2)
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lead ores (1)
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lead-zinc deposits (1)
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silver ores (1)
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zinc ores (1)
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mineral deposits, genesis (5)
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mineral exploration (1)
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petroleum (1)
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-
elements, isotopes
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carbon
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C-13/C-12 (10)
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organic carbon (1)
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chemical ratios (3)
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hydrogen
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D/H (1)
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isotope ratios (19)
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isotopes
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radioactive isotopes
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Ar-40/Ar-39 (1)
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Pb-206/Pb-204 (1)
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Sm-147/Nd-144 (1)
-
-
stable isotopes
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Ar-40/Ar-39 (1)
-
C-13/C-12 (10)
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D/H (1)
-
Hf-177/Hf-176 (1)
-
Nd-144/Nd-143 (2)
-
O-18/O-16 (8)
-
Os-188/Os-187 (1)
-
Pb-206/Pb-204 (1)
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Pb-207/Pb-206 (2)
-
S-34/S-32 (3)
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Sm-147/Nd-144 (1)
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Sr-87/Sr-86 (5)
-
-
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metals
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actinides
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uranium (3)
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-
alkali metals
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lithium (1)
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rubidium (3)
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sodium (1)
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-
alkaline earth metals
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barium (1)
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beryllium (1)
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calcium (1)
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strontium
-
Sr-87/Sr-86 (5)
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-
-
aluminum (1)
-
hafnium
-
Hf-177/Hf-176 (1)
-
-
iron (1)
-
lead
-
Pb-206/Pb-204 (1)
-
Pb-207/Pb-206 (2)
-
-
platinum group
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osmium
-
Os-188/Os-187 (1)
-
-
-
rare earths
-
neodymium
-
Nd-144/Nd-143 (2)
-
Sm-147/Nd-144 (1)
-
-
samarium
-
Sm-147/Nd-144 (1)
-
-
-
zirconium (1)
-
-
noble gases
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argon
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Ar-40/Ar-39 (1)
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-
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oxygen
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O-18/O-16 (8)
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selenium (1)
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silicon (1)
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sulfur
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S-34/S-32 (3)
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-
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fossils
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Graptolithina
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Graptoloidea (1)
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ichnofossils (1)
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Invertebrata
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Arthropoda
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Trilobitomorpha
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Trilobita (2)
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-
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Porifera (1)
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Metazoa (1)
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microfossils
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Chitinozoa (1)
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Conodonta (1)
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palynomorphs
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acritarchs (1)
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Chitinozoa (1)
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Plantae
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algae (2)
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problematic fossils (1)
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thallophytes (2)
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geochronology methods
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Ar/Ar (6)
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K/Ar (11)
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paleomagnetism (1)
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Rb/Sr (15)
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Re/Os (2)
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Sm/Nd (13)
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Sr/Sr (1)
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U/Pb (44)
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geologic age
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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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Paleogene
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Paleocene (1)
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-
-
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Dalradian (238)
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Mesozoic
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Cretaceous
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Lower Cretaceous (1)
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Jurassic (1)
-
-
Paleozoic
-
Cambrian
-
Lower Cambrian (9)
-
Upper Cambrian (2)
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-
Carboniferous
-
Lower Carboniferous
-
Dinantian (2)
-
-
Upper Carboniferous
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Westphalian (1)
-
-
-
Devonian
-
Lower Devonian (1)
-
Middle Devonian (1)
-
Old Red Sandstone (5)
-
Upper Devonian (1)
-
-
Leinster Granite (1)
-
lower Paleozoic (7)
-
Ordovician
-
Lower Ordovician
-
Arenigian
-
Ballantrae Complex (2)
-
-
-
Middle Ordovician
-
Llanvirnian (1)
-
-
Upper Ordovician
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Ashgillian (1)
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Caradocian (1)
-
-
-
Sauk Sequence (1)
-
Silurian
-
Lower Silurian
-
Llandovery (2)
-
Wenlock (2)
-
-
Middle Silurian (1)
-
Upper Silurian
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Ludlow (1)
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Pridoli (1)
-
-
-
upper Paleozoic (2)
-
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Phanerozoic (2)
-
Precambrian
-
Archean
-
Neoarchean (1)
-
-
Hecla Hoek Formation (1)
-
Lewisian Complex (2)
-
upper Precambrian
-
Proterozoic
-
Mesoproterozoic (5)
-
Neoproterozoic
-
Cryogenian (5)
-
Ediacaran
-
Wonoka Formation (1)
-
-
Infracambrian (5)
-
Marinoan (3)
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Moine Supergroup (5)
-
Moinian (8)
-
Riphean (2)
-
Sturtian (6)
-
Tonian (3)
-
Torridonian (4)
-
Vendian (9)
-
-
Paleoproterozoic (8)
-
-
-
-
-
igneous rocks
-
igneous rocks
-
plutonic rocks
-
diorites
-
tonalite (1)
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trondhjemite (1)
-
-
gabbros (8)
-
granites
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aplite (1)
-
-
granodiorites (1)
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lamprophyres (3)
-
pegmatite (1)
-
ultramafics
-
peridotites (1)
-
-
-
porphyry (1)
-
volcanic rocks
-
basalts
-
mid-ocean ridge basalts (2)
-
shoshonite (1)
-
-
pyroclastics
-
tuff (3)
-
-
rhyolites
-
quartz porphyry (1)
-
-
-
-
ophiolite (11)
-
volcanic ash (1)
-
-
metamorphic rocks
-
metamorphic rocks
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amphibolites (2)
-
gneisses
-
granite gneiss (1)
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orthogneiss (1)
-
-
hornfels (4)
-
marbles (3)
-
metacarbonate rocks (2)
-
metaigneous rocks
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metabasalt (3)
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metabasite (5)
-
metadiabase (1)
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metagabbro (4)
-
metagranite (1)
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metatuff (1)
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serpentinite (1)
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-
metaplutonic rocks (1)
-
metasedimentary rocks
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metaconglomerate (1)
-
metalimestone (2)
-
metapelite (4)
-
-
metasomatic rocks
-
serpentinite (1)
-
-
metavolcanic rocks (5)
-
migmatites (6)
-
mylonites (2)
-
phyllites (2)
-
schists
-
greenschist (2)
-
-
slates (4)
-
-
ophiolite (11)
-
turbidite (3)
-
-
minerals
-
carbonates
-
calcite (3)
-
dolomite (2)
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ikaite (1)
-
-
minerals (6)
-
phosphates
-
monazite (2)
-
xenotime (1)
-
-
silicates
-
chain silicates
-
amphibole group
-
clinoamphibole
-
cummingtonite (1)
-
hornblende (2)
-
-
-
wollastonite group
-
wollastonite (1)
-
-
-
framework silicates
-
feldspar group
-
alkali feldspar
-
celsian (1)
-
K-feldspar (2)
-
-
barium feldspar
-
celsian (1)
-
-
plagioclase
-
albite (3)
-
-
-
silica minerals
-
quartz (2)
-
-
-
orthosilicates
-
nesosilicates
-
andalusite (1)
-
garnet group (9)
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grandidierite (1)
-
kyanite (3)
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sillimanite (5)
-
staurolite (3)
-
titanite group
-
titanite (1)
-
-
zircon group
-
zircon (33)
-
-
-
-
ring silicates
-
cordierite (1)
-
-
sheet silicates
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clay minerals (1)
-
margarite (1)
-
mica group
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biotite (1)
-
muscovite (7)
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phengite (1)
-
-
-
-
sulfates (1)
-
sulfides
-
pyrite (2)
-
-
-
Primary terms
-
absolute age (65)
-
Arctic region
-
Greenland
-
East Greenland (1)
-
-
Svalbard
-
Spitsbergen
-
Nordaustlandet (1)
-
Spitsbergen Island
-
Ny Friesland (1)
-
-
-
-
-
Asia
-
Far East
-
Taiwan (1)
-
-
Himalayas (1)
-
-
Atlantic Ocean
-
North Atlantic (2)
-
-
Atlantic Ocean Islands
-
Shetland Islands
-
Unst (1)
-
-
-
Atlantic region (1)
-
Australasia
-
New Zealand (1)
-
-
barite deposits (3)
-
bibliography (1)
-
Canada
-
Eastern Canada
-
Maritime Provinces
-
New Brunswick (1)
-
-
Newfoundland and Labrador
-
Labrador (1)
-
Newfoundland (5)
-
-
-
-
carbon
-
C-13/C-12 (10)
-
organic carbon (1)
-
-
Cenozoic
-
Quaternary
-
Pleistocene (1)
-
-
Tertiary
-
Paleogene
-
Paleocene (1)
-
-
-
-
chemical analysis (1)
-
clay mineralogy (1)
-
coal deposits (1)
-
continental drift (8)
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continental shelf (1)
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crust (4)
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crystal chemistry (1)
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crystal growth (4)
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data processing (1)
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deformation (48)
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diagenesis (7)
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economic geology (2)
-
Europe
-
Western Europe
-
Ballachulish Complex (1)
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Ireland
-
Donegal Ireland
-
Ardara Pluton (1)
-
-
Galway Ireland
-
Connemara (25)
-
Galway Granite (1)
-
-
Mayo Ireland (14)
-
Sligo Ireland (1)
-
Tipperary Ireland
-
Cashel Ireland (2)
-
-
-
United Kingdom
-
English Channel Islands (1)
-
Great Britain
-
Scotland
-
Aberdeenshire Scotland
-
Aberdeen Scotland (1)
-
Huntly Scotland (1)
-
-
Angus Scotland (1)
-
Argyllshire Scotland
-
Islay (6)
-
Jura Island (1)
-
-
Ayrshire Scotland (1)
-
Banffshire Scotland (2)
-
Dundee Scotland (1)
-
Firth of Clyde (1)
-
Glasgow Scotland (2)
-
Great Glen Fault (3)
-
Hebrides
-
Inner Hebrides
-
Islay (6)
-
Isle of Skye (1)
-
Jura Island (1)
-
-
-
Highland region Scotland
-
Inverness-shire Scotland
-
Inverness Scotland (1)
-
Isle of Skye (1)
-
-
-
Moine thrust zone (3)
-
Perthshire Scotland
-
Aberfeldy (2)
-
-
Scottish Highlands
-
Grampian Highlands (24)
-
Scottish Northern Highlands (4)
-
-
Shetland Islands
-
Unst (1)
-
-
-
Wales
-
Anglesey Wales (1)
-
-
-
Northern Ireland
-
Londonderry Northern Ireland (1)
-
Tyrone Northern Ireland (2)
-
-
-
-
-
faults (43)
-
feldspar deposits (1)
-
folds (34)
-
foliation (7)
-
fractures (4)
-
geochemistry (23)
-
geochronology (9)
-
geology (1)
-
geophysical methods (2)
-
glacial geology (4)
-
Graptolithina
-
Graptoloidea (1)
-
-
heat flow (1)
-
hydrogen
-
D/H (1)
-
-
ichnofossils (1)
-
igneous rocks
-
plutonic rocks
-
diorites
-
tonalite (1)
-
trondhjemite (1)
-
-
gabbros (8)
-
granites
-
aplite (1)
-
-
granodiorites (1)
-
lamprophyres (3)
-
pegmatite (1)
-
ultramafics
-
peridotites (1)
-
-
-
porphyry (1)
-
volcanic rocks
-
basalts
-
mid-ocean ridge basalts (2)
-
shoshonite (1)
-
-
pyroclastics
-
tuff (3)
-
-
rhyolites
-
quartz porphyry (1)
-
-
-
-
inclusions
-
fluid inclusions (2)
-
-
intrusions (33)
-
Invertebrata
-
Arthropoda
-
Trilobitomorpha
-
Trilobita (2)
-
-
-
Porifera (1)
-
-
isostasy (1)
-
isotopes
-
radioactive isotopes
-
Ar-40/Ar-39 (1)
-
Pb-206/Pb-204 (1)
-
Sm-147/Nd-144 (1)
-
-
stable isotopes
-
Ar-40/Ar-39 (1)
-
C-13/C-12 (10)
-
D/H (1)
-
Hf-177/Hf-176 (1)
-
Nd-144/Nd-143 (2)
-
O-18/O-16 (8)
-
Os-188/Os-187 (1)
-
Pb-206/Pb-204 (1)
-
Pb-207/Pb-206 (2)
-
S-34/S-32 (3)
-
Sm-147/Nd-144 (1)
-
Sr-87/Sr-86 (5)
-
-
-
lava (2)
-
lineation (1)
-
magmas (7)
-
mantle (2)
-
maps (3)
-
Mesozoic
-
Cretaceous
-
Lower Cretaceous (1)
-
-
Jurassic (1)
-
-
metal ores
-
base metals (1)
-
gold ores (2)
-
lead ores (1)
-
lead-zinc deposits (1)
-
silver ores (1)
-
zinc ores (1)
-
-
metals
-
actinides
-
uranium (3)
-
-
alkali metals
-
lithium (1)
-
rubidium (3)
-
sodium (1)
-
-
alkaline earth metals
-
barium (1)
-
beryllium (1)
-
calcium (1)
-
strontium
-
Sr-87/Sr-86 (5)
-
-
-
aluminum (1)
-
hafnium
-
Hf-177/Hf-176 (1)
-
-
iron (1)
-
lead
-
Pb-206/Pb-204 (1)
-
Pb-207/Pb-206 (2)
-
-
platinum group
-
osmium
-
Os-188/Os-187 (1)
-
-
-
rare earths
-
neodymium
-
Nd-144/Nd-143 (2)
-
Sm-147/Nd-144 (1)
-
-
samarium
-
Sm-147/Nd-144 (1)
-
-
-
zirconium (1)
-
-
metamorphic rocks
-
amphibolites (2)
-
gneisses
-
granite gneiss (1)
-
orthogneiss (1)
-
-
hornfels (4)
-
marbles (3)
-
metacarbonate rocks (2)
-
metaigneous rocks
-
metabasalt (3)
-
metabasite (5)
-
metadiabase (1)
-
metagabbro (4)
-
metagranite (1)
-
metatuff (1)
-
serpentinite (1)
-
-
metaplutonic rocks (1)
-
metasedimentary rocks
-
metaconglomerate (1)
-
metalimestone (2)
-
metapelite (4)
-
-
metasomatic rocks
-
serpentinite (1)
-
-
metavolcanic rocks (5)
-
migmatites (6)
-
mylonites (2)
-
phyllites (2)
-
schists
-
greenschist (2)
-
-
slates (4)
-
-
metamorphism (81)
-
metasomatism (7)
-
mineral deposits, genesis (5)
-
mineral exploration (1)
-
mineralogy (4)
-
minerals (6)
-
noble gases
-
argon
-
Ar-40/Ar-39 (1)
-
-
-
North America
-
Appalachians
-
Northern Appalachians (2)
-
-
Canadian Shield
-
Grenville Province (3)
-
-
-
orogeny (29)
-
oxygen
-
O-18/O-16 (8)
-
-
Pacific region
-
Pacific mobile belt (1)
-
-
paleoclimatology (3)
-
paleogeography (14)
-
paleomagnetism (1)
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GeoRef Categories
Era and Period
Epoch and Age
Book Series
Date
Availability
Dalradian
The Neoproterozoic glacial broom Open Access
Provenance of the Trainor's Rocks microconglomerate, Northern Ireland: a mid-Silurian (Hawick Group) submarine channel fan deposit in the closing Iapetus Ocean Available to Purchase
Middle Neoproterozoic–Early Ordovician: foreland basins, climatic extremes and rift-to-drift margins Available to Purchase
Early–Middle Ordovician Grampian orogenesis: ophiolite obduction and arc–continent collision Available to Purchase
Glacially influenced provenance and Sturtian affinity revealed by detrital zircon U–Pb ages from sandstones in the Port Askaig Formation, Dalradian Supergroup Open Access
Geometrical restoration of a late Neoproterozoic depositional framework and an intrabasinal unconformity in the Laurentian margin Dalradian Supergroup, Grampian Highlands, Scotland Open Access
Evidence, or not, for the late Tonian break-up of Rodinia? The Dalradian Supergroup, Scotland Open Access
Discussion of Searle, ‘Tectonic evolution of the Caledonian orogeny in Scotland: a review based on the timing of magmatism, metamorphism and deformation’ Available to Purchase
Temporal and spatial variations in calcium carbonate deposition in a mixed siliciclastic–carbonate deep marine system: the Ediacaran Deeside Limestone Formation, Aboyne, Scotland Available to Purchase
Testing petrogenetic models for contemporaneous mafic and felsic to intermediate magmatism within the “Newer Granite” suite of the Scottish and Irish Caledonides Available to Purchase
ABSTRACT Granitoid batholiths dominated by felsic to intermediate compositions are commonly associated with mafic plutons and enclaves; however, the genetic relationship between the apparently coeval but compositionally dissimilar magmas is unclear. Here, we reviewed the age and lithogeochemical and Nd-Sr isotopic compositions of some classic plutonic rocks emplaced in the Northern Highlands, Grampian and Connemara terranes of the Caledonide orogen of Scotland and Ireland. The Northern Highlands terrane consists mostly of Neoproterozoic metasedimentary rocks of the Moine Supergroup and is located north of the Great Glen fault. The Grampian terrane also consists of Neoproterozoic metasedimentary rocks (Dalradian Supergroup) and is located south of the Great Glen fault in both Scotland and Ireland. Amphibolite-facies metasedimentary rocks in the Connemara terrane are correlated with the Dalradian Supergroup, and the terrane is bounded by splays of the Highland Boundary and Southern Uplands faults. These three terranes were intruded by Silurian–Devonian mafic and felsic to intermediate plutonic rocks that display field evidence for mingling and mixing and have a similar range (between ca. 437 and 370 Ma) in emplacement ages. This range implies they were intruded during and after the late Caledonian Scandian orogenic event that resulted from the mid- to late Silurian collision of amalgamated Avalonia and Baltica with Laurentia and the final closure of the Iapetus Ocean. Our review supports the contention that the Great Glen fault represents a major compositional boundary in the Silurian lithosphere. Felsic to intermediate plutons that occur north of the Great Glen fault are more enriched in light rare earth elements and Ba-Sr-K compared to those to the south. Isotopic compositions of these late Caledonian plutonic rocks on both sides of the Great Glen fault indicate that metasomatism and enrichment of the subcontinental lithospheric mantle beneath the Northern Highlands terrane occurred just prior to emplacement of late Caledonian plutons. Within the same terrane, mafic and felsic to intermediate rocks display similar trace-element and rare earth element concentrations compatible with models implying that fractionation of a mafic magma played an important role in generating the felsic to intermediate magmas. The onset of slab failure magmatism may have been diachronous along the length of the collision zone. If so, slab failure may have propagated laterally, possibly initiating where promontories collided.
Sedimentary provenance of Silurian basins in western Ireland during Iapetus closure Available to Purchase
ABSTRACT Three Silurian basin fills, the Llandovery–Wenlock Croagh Patrick and Killary Harbour–Joyce Country successions and the Ludlow–Pridoli Louisburgh–Clare Island succession, overstep the tectonic contacts between elements of the Grampian (Taconic) accretionary history of the Caledonian-Appalachian orogeny in western Ireland. New U-Pb detrital zircon data from lower strata of these Silurian rocks provide insight into basin evolution and paleogeography. The shallow-marine Croagh Patrick succession unconformably overlies the Clew Bay Complex and the northern part of the Ordovician South Mayo Trough. Two samples have zircon populations dominated by Proterozoic grains typical of the Laurentian margin, with few younger grains. Up to 13% of the grains form a cluster at ca. 950–800 Ma, which is younger than known Grenville magmatism on the local Laurentian margin and older than known magmatism from Iapetan rifting; these may be recycled grains from Dalradian strata, derived from distal Tonian intrusions. The Killary Harbour–Joyce Country succession overlies the structural contact between the Lough Nafooey arc and the Connemara Dalradian block and records a transgressive-regressive cycle. Four samples of the Lough Mask Formation show contrasting age spectra. Two samples from east of the Maam Valley fault zone, one each from above Dalradian and Nafooey arc basement, are dominated by Proterozoic grains with ages typical of a Laurentian or Dalradian source, likely in north Mayo. One sample also includes 8% Silurian grains. Two samples from west of the fault overlie Dalradian basement and are dominated by Ordovician grains. Circa 450 Ma ages are younger than any preserved Ordovician rocks in the region and are inferred to represent poorly preserved arc fragments that are exposed in northeastern North America. Cambrian to late Neoproterozoic grains in association with young Ordovician ages suggest derivation from a peri-Gondwanan source in the late stages of Iapetus closure. The Louisburgh–Clare Island succession comprises terrestrial red beds. It unconformably overlies the Clew Bay Complex on Clare Island and is faulted against the Croagh Patrick succession on the mainland. The Strake Banded Formation yielded an age spectrum dominated by Proterozoic Laurentian as well as Ordovician–Silurian ages. Although the basin formed during strike-slip deformation along the Laurentian margin in Ireland and Scotland, sediment provenance is consistent with local Dalradian sources and contemporaneous volcanism. Our results support ideas that Ganderian continental fragments became part of Laurentia prior to the full closure of the Iapetus Ocean.