The term "molasse" (/məˈlæs/) refers to sandstones, shales and conglomerates that form as terrestrial or shallow marine deposits in front of rising mountain chains. The molasse deposits accumulate in a foreland basin, especially on top of flysch-like deposits, for example, those that left from the rising Alps, or erosion in the Himalaya. These deposits are typically the non-marine alluvial and fluvialsediments of lowlands, as compared to deep-water flysch sediments. Sedimentation stops when the orogeny stops, or when the mountains have eroded flat.[1]
The molasse can sometimes completely fill a foreland basin, creating a nearly flat depositional surface, that nonetheless remains a structural syncline. Molasse can be very thick near the mountain front, but usually thins out towards the interior of a craton; such massive, convex accumulations of sediment are known as clastic wedges.[1]
See alsoEdit
Geology of the Himalaya – Origins and structure of the mountain rangePages displaying short descriptions of redirect targets
^ ab Stanley, Steven M., Earth System History, New York: W.H. Freeman and Company, 1999, p.243 ISBN0-7167-2882-6
Further readingEdit
Sinclair, H. D. (1997) "Flysch to molasse transition in peripheral foreland basins: the role of the passive margin versus slab breakoff" Geology 25(12): pp. 1123–1126, doi: 10.1130/0091-7613(1997)025<1123:FTMTIP>2.3.CO;2
Tenchov, Yanaki G. (1989) "Demarcation of Molasse from Non-molasse sediments" Zeitschrift für geologische Wissenschaften 17(8): pp. 791–796
molasse, confused, with, molasses, term, molasse, refers, sandstones, shales, conglomerates, that, form, terrestrial, shallow, marine, deposits, front, rising, mountain, chains, molasse, deposits, accumulate, foreland, basin, especially, flysch, like, deposits. Not to be confused with molasses The term molasse m e ˈ l ae s refers to sandstones shales and conglomerates that form as terrestrial or shallow marine deposits in front of rising mountain chains The molasse deposits accumulate in a foreland basin especially on top of flysch like deposits for example those that left from the rising Alps or erosion in the Himalaya These deposits are typically the non marine alluvial and fluvial sediments of lowlands as compared to deep water flysch sediments Sedimentation stops when the orogeny stops or when the mountains have eroded flat 1 Nagelfluh molasse Speer Appenzell AlpsThe molasse can sometimes completely fill a foreland basin creating a nearly flat depositional surface that nonetheless remains a structural syncline Molasse can be very thick near the mountain front but usually thins out towards the interior of a craton such massive convex accumulations of sediment are known as clastic wedges 1 See also EditGeology of the Himalaya Origins and structure of the mountain rangePages displaying short descriptions of redirect targets Molasse basin Foreland basin north of the AlpsReferences Edit a b Stanley Steven M Earth System History New York W H Freeman and Company 1999 p 243 ISBN 0 7167 2882 6Further reading EditSinclair H D 1997 Flysch to molasse transition in peripheral foreland basins the role of the passive margin versus slab breakoff Geology 25 12 pp 1123 1126 doi 10 1130 0091 7613 1997 025 lt 1123 FTMTIP gt 2 3 CO 2 Tenchov Yanaki G 1989 Demarcation of Molasse from Non molasse sediments Zeitschrift fur geologische Wissenschaften 17 8 pp 791 796External links Edithttp www see leeds ac uk structure alps map molasse htm Molasse definitions and examples simplified geological map of the western Alps University of Leeds nbsp This sedimentology article is a stub You can help Wikipedia by expanding it vte Retrieved from https en wikipedia org w index php title Molasse amp oldid 1166830860, wikipedia, wiki, book, books, library,
