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- sierradetecka @fieldwork:sierradetecka #Argentina #Jurassic #Paleozoic #Patagonia #Sierra de Tecka #fieldwork #laccolith #mapping
- of Tecka in the District of Languiñeo (see Figs. 2a & 2b). It belongs geomorphologically to the Patag... eous magmatic texture on the outcrop scale (Fig. 22a). Fresh pieces show a light-grey groundmass with ... t mineral in the analysed samples is plagioclase, making up around 70% by volume. The grains have a hypidi