Dunnage Melange and Subduction of the Protacadic Ocean Northeast Newfoundland
1976; Geological Society of America; Linguagem: Inglês
10.1130/spe175-p1
ISSN2331-219X
Autores Tópico(s)Hydrocarbon exploration and reservoir analysis
ResumoThe Dunnage melange outcrop, 10 km wide between the Dildo and Holmes Point faults on the north and south, is truncated eastward by the northeast-trending Reach fault. The matrix of laminated black and greenish argillite has interbeds of graded graywacke, tuff, and lava. A limestone layer has Middle Cambrian fossils. Olistostromes are interbedded. Boulders are mainly graywacke and pillow lava, with less abundant plutonic and volcanic rocks, chert and dolomite; spheroidal masses exceed diameters of 10 m; facings are rather random. Southeast-dipping cleavage is isoclinally folded; primary structures (including bedding) rarely are apparent.
Referência(s)