porphyritic उदाहरण वाक्य
उदाहरण वाक्य
- The Twin Lakes lava is black, porphyritic and has abundant xenocrysts of quartz ( see Cinder Cone ).
- The rock has a porphyritic texture with large crystals of orthopyroxene and phlogopite set in a fine grained matrix.
- To the west are a few mafic porphyritic basalts and possibly older Miocene basalts cut by dykes and faults.
- In this connection we may repeat what has been said above about the corrosion of porphyritic minerals in igneous rocks.
- Many examples are banded or striated; others contain porphyritic crystals of quartz which resemble those of the felsites and porphyries.
- The leucite is often present in two sets of crystals, both porphyritic and as an ingredient of the ground mass.
- The "'Palisades Sill "'is a fine-grained porphyritic dacite Cimarron in northern New Mexico.
- This can be roughly translated to'Red River', perhaps reflecting the red porphyritic pebbles found here in large numbers.
- The Paleozoic strata have been intruded by numerous dikes, and sheets of basalts, andesite-basalts, and porphyritic diorite.
- The primary benefit of calculating a CIPW norm is determining what the ideal mineralogy of an aphanitic or porphyritic igneous rock is.