更多porphyritic例句

1. Dark grey porphyritic hornstone, approaching to compact felspar, with imbedded crystals of felspar.
2. Porphyritic mountains, says M. Maury, imprint on the landscape a peculiarly picturesque character.
3. That is, the metamorphic rocks are characteristically holocrystalline, while igneous rocks are porphyritic, or cryptocrystalline.
4. The lavas comprise dark pitchstone, resembling that at Kirk Yetholm, and porphyritic and amygdaloidal andesites and basalts.
5. But the bulk of the moraine is composed of porphyritic granite derived from Feldspar and Cathedral Valleys.