hypocrystalline

(ˌhaɪpəʊˈkrɪstəˌlaɪn)

adj

(Geological Science) (of igneous rocks) having both glass and crystalline components. Former word: hemicrystalline See holocrystalline

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Mentioned in ?

hemicrystalline

References in periodicals archive ?

Calcite, hypocrystalline dolomite particles and tuffaceous materials were abundant in mudstone.

ORGANIC GEOCHEMISTRY AND DEPOSITIONAL ARCHITECTURE OF JIMUSAER OIL SHALE, JUNGGAR BASIN, NW CHINA

These are porphyritic and hypocrystalline rocks that occasionally host basic enclaves.

Origin and provenance of igneous clasts from late Palaeozoic conglomerate formations (Del Raton and El Planchon) in the Andean Precordillera of San Juan, Argentina

The phenocrysts are alkali feldspar (Or60-65) [+ or -] clinopyroxene (Wo46-49Fs14-20) [+ or -] plagioclase (An14-16), pseudomorphosed leucite, amphibole, and biotite in a hypocrystalline to glassy groundmass containing microlites of alkali feldspar, biotite, and clinopyroxene [+ or -] biotite [+ or -] amphibole [+ or -] magnetite [+ or -] Ti-andradite [+ or -] haematite.

Magmatism in the Asuncion-Sapucai-Villarrica Graben (Eastern Paraguay) revisited: petrological, geophysical, geochemical, and geodynamic inferences

They are fine- to medium-grained and holocrystalline to hypocrystalline; many are porphyritic and some display flow alignment in phenocrysts.

Petrography and preliminary geochemistry of alkaline mafic dykes in the Nagar Parkar igneous complex, southeastern Sindh