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CRINOIDAL TURBIDITES FROM THE DEVONIAN OF CORNWALL AND THEIR PALAEOGEOGRAPHIC SIGNIFICANCE
Author(s) -
TUCKER MAURICE E.
Publication year - 1969
Publication title -
sedimentology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.494
H-Index - 108
eISSN - 1365-3091
pISSN - 0037-0746
DOI - 10.1111/j.1365-3091.1969.tb00174.x
Subject(s) - devonian , geology , turbidite , pelite , paleontology , bedding , debris , sedimentary rock , oceanography , metamorphic rock , horticulture , biology
SUMMARY Devonian limestone turbidites from North Cornwall, composed mainly of crinoidal debris, are considered to have been derived from an oceanic rise or schwelle. Large‐scale cross‐bedding (representing division C) occurs in some limestone bands. The turbidites lack a pelitic division and there is usually a sharp contact with the shales above. Typical flutes are rare but broad grooves and channels are present on the soles.