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The caradoc rocks around llyn cowlyd, North Wales
Author(s) -
Diggens J. N.,
Romano M.
Publication year - 1968
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.3350060105
Subject(s) - rhyolite , unconformity , geology , ecological succession , volcano , fauna , sequence (biology) , period (music) , volcanic rock , paleontology , volcanic plateau , series (stratigraphy) , geochemistry , archaeology , sedimentary rock , geography , ecology , genetics , physics , acoustics , biology
A thick succession of Middle Caradoc sediments (Glanrafon Beds) with occasional volcanic horizons is described. Faunas found within the succession prove a Soudleyan to Lower Longvillian age for these sediments. Detailed mapping has shown the presence of an unconformity between the Glanrafon Beds and the overlying Lower Rhyolite Tuff of the Snowdon Volcanic Series. A new fauna from the sediments within the Capel Curig Volcanic Series proves a Soudleyan (?Lower) age for this period of vulcanicity.