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THE ORIGIN AND SIGNIFICANCE OF SAND VOLCANOES IN THE BUDE FORMATION (CORNWALL)
Author(s) -
BURNE R. V.
Publication year - 1970
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.1365-3091.1970.tb02186.x
Subject(s) - geology , mudflow , sedimentary depositional environment , sedimentary rock , geochemistry , volcano , sedimentary structures , deposition (geology) , mud volcano , geomorphology , landslide , sediment , structural basin
Summary Sand volcanoes have been found in three sedimentary associations in the Upper Carboniferous Bude Formation. In two of these associations they formed when the dewatering of fluidized sand beds, deposited from traction carpets, was temporarily inhibited by the deposition of overlying units. In the third association the volcanoes formed during the normal post‐depositional compaction of fluidized, muddy, poorly sorted units deposited from subaqueous mudflows. While is seems that the tops of fluidized sand beds were characteristically sheared by a fairly powerful current immediately after being deposited, the waters above the recently deposited mudflow units were commonly stagnant, allowing sand volcano growth.