ophicalcite


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ophicalcite

(ˌɒfɪˈkælsaɪt)
n
(Geological Science) a type of marble containing serpentine and calcite
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From the western part of Sierra de los Placeres to the northwestern part of Sierra de Campo Nuevo the San Hipolito consists of serpentinites, microgabbros, spilitic pillow lavas, ophicalcites, radiolarites, with minor interbedded tuffs and claystones.
South of the Puerto Nuevo block the San Hipolito Formation is represented in the eastern vicinities of the San Jose de Castro--Bahia Asuncion Road, by serpentinites and spilites; in the Sierras El Chorrito and Los Ajos (some 5 km east of Puerto Nuevo), and in the valley of Arroyo San Cristobal (FIGURES 16 and 17) by abundant ophicalcites, spilites, volcano-sedimentary strata, thin bedded gray siliceous deposits, radiolarites, with interbedded limestone and pink dolomite; on either side of the Puerto Nuevo Canyon, at about 2 km from Puerto Nuevo, by ophicalcites, light gray limestone, and some sandstone.
In fact, in the Vizcaino Peninsula there are two ultrabasic-basic rocks-bearing units: the Puerto Nuevo Layered Complex (harzburgite--dunite--cyclic units including pyroxenite, gabbros and diorites of the Puerto Nuevo and La Pintada Sequences), and the overlying San Hipolito Zone (serpentinites, microgabbros, spilitic pillow lavas, ophicalcites, radiolarites, tuffs, graywackes, interbedded limestones and dolomites, siliceous sandstones, and volcanosedimentary strata).
Las rocas intrusivas basicas-ultrabasicas del Complejo Estratificado del Vizcaino y la ofiolita del Vizcaino (Baja California Sur, Mexico)
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