epiclastic

epiclastic

[¦ep·ə′klas·tik]
(geology)
Pertaining to the texture of mechanically deposited sediments consisting of detrital material from preexistent rocks.
References in periodicals archive ?
The basin is underlain by Clarkie Formation epiclastic rocks; greywacke, siltstone, polymictic conglomerate and iron formation.
Furthermore the occurrence of strong winds, due to the exposition of the island, and the steep volcanic surfaces don't allow the accumulation of epiclastic deposits possibly produced by the erosional processes.
1980), and epiclastic volcanic sediments; the Culm Group, constituting the stratigraphic top of the Pyrite Belt, comprises a succession of shales and greywackes; turbidite and flysch Unit (Moreno, 1993).
The Main-a-Dieu Group consists of mainly tuffaceous sedimentary and epiclastic rocks, with minor basaltic and rhyolitic flows, interpreted by Barr et al.
Petrology of continental pyroclastic and epiclastic sequences in the Chubut Group [Cretaceous]: Los Altares-Las Plumas area, Chubut, Patagonia Argentina, Rev.
Volcanic and epiclastic sucessions of Punta Atahuanca (Huacho, north of Lima)
Bright yellow, highly birefringent smectite forms argillan rims around the mineralogically stable epiclastic grains (mainly quartz) and pseudomorphs them.
The Hattu schist belt consists of a number of bifurcating zones, several kilometers in width, which consist predominantly of epiclastic sediments and felsic to intermediate volcanics, and less voluminous tholeiitic and komatiitic rocks deposited at 2.
The volcanic facies consists of andesite, basalt, rhyolitic flow rocks, pyroclastic sediments, and epiclastic sediments derived from the volcanic materials.
Recent work on the 18 claim (450 hectares) copper property known has the "Shaylee" property have uncovered some very impressive native copper along with globs of massive chalcocite in quartz veins hosted by sericite schist derived from felsic volcanic & epiclastic sediment protholiths.
2011) is conformed by andesite lavas, tuffs and epiclastic volcanic breccias/conglomerates representing remnants of andesite stratovolcanoes.
In contrast, the Main-a-Dieu Group consists dominantly of tuffaceous sedimentary and epiclastic rocks with subordinate basaitic and rhyolitic flows and turf.