olistostrome


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olistostrome

[ə′lis·tə‚strōm]
(geology)
A sedimentary deposit composed of a chaotic mass of heterogeneous material that is intimately mixed; accumulated in the form of a semifluid body by submarine gravity sliding or slumping of unconsolidated sediments.
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grey sandstone with conglomerate or olistostrome of Simonton Corners (=?
It was also demonstrated that the common association of 'tillites and carbonates' was the product of active tectonic settings in which non-glacial marine mass flows were interbedded with olistostromes, debris flows and turbidites composed of detrital, reworked carbonate (Schermerhorn, 1974).
Such successions are dominated by turbidites, olistostromes and debris-flow facies; some, where uplift or latitude was appropriate, are glacially influenced, but many are not (Schermerhorn, 1974, 1975; Eyles, 1993).
The Hurricane Mountain Formation of mainly Middle and Upper Cambrian strata, containing polymictic tectonic melange with olistostromes, is interpreted as an accretionary wedge related to a subduction zone lying south of the Boundary Mountains terrane and dipping southeast beneath the Gander margin.
Melanges and olistostromes associated with ophiolitic metabasalts and their significance in Cambro-Ordovician forearc accretion in the Northern Appalachians.