Allochthonous Ordovician strata of Rancho San Marcos, Baja California Norte, Mexico
1993; Geological Society of America; Linguagem: Inglês
10.1130/spe279-p11
ISSN2331-219X
Autores Tópico(s)Geochemistry and Geologic Mapping
ResumoAt Rancho San Marcos, halfway between Tecate and Ensenada in northwestern Baja California, a 1 km by 5 km group of giant olistoliths of Early Ordovician age occurs within phyllite and metasandstone of Mesozoic(?) age. This group of giant olistoliths is underlain by a mélange of olistolith-derived granule to boulder-size fragments in a foliated, phyllitic matrix. Granitic rocks and andesite/dacite dikes of the Cretaceous Peninsular Ranges arc and batholith intrude both autochthonous and allochthonous rocks.
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