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The stratigraphy of Ordovician volcanic rocks on the southern and eastern flanks of the Harlech Dome in Merionethshire
Author(s) -
Ridgway J.
Publication year - 1975
Publication title -
geological journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.721
H-Index - 54
eISSN - 1099-1034
pISSN - 0072-1050
DOI - 10.1002/gj.3350100201
Subject(s) - geology , ordovician , stratigraphy , dome (geology) , volcano , group (periodic table) , paleontology , ecological succession , geomorphology , tectonics , organic chemistry , biology , ecology , chemistry
The stratigraphy of nine areas of Ordovician volcanic rocks flanking the Harlech Dome is dcscribed and a correlation of the Ordoyician volcanic succession from Arenig to Cader Idris proposed. Nine formations are distinguished which together form a distinct lithostratigraphic unit termed the Aran Volcanic Group. At least six disconformities can bc recognised within the Group.