Premium
CONVOLUTE LAMINATION AND OTHER STRUCTURES FROM THE LOWER COAL MEASURES OF YORKSHIRE
Author(s) -
DAVIES HUW G.
Publication year - 1965
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.1365-3091.1965.tb01564.x
Subject(s) - lamination , geology , syncline , coal , sedimentary rock , geotechnical engineering , sedimentary structures , anticline , geochemistry , geomorphology , paleontology , composite material , facies , tectonics , materials science , engineering , layer (electronics) , structural basin , waste management
SUMMARY Several deformational sedimentary structures are recorded from the non‐marine sandstones of the Lower Coal Measures of Yorkshire. Some of these structures may be termed convolute lamination and for others the term corrugated lamination is proposed. The scope and synonyms of convolute lamination are discussed and both terms are defined and illustrated. The essential difference between convolute lamination and corrugated lamination is the absence of an overall anticline‐syncline morphology in the latter. Rupture of lamination through most of the thickness of the deformed horizons give rise to rupture structures. A petrological investigation of the sediments showed slight variations in both grain size and mineralogy within individually deformed horizons. The structures are considered to be the result of load casting, caused by heterogeneity of the sediment, and/or thixotropic behaviour.