Diabase or Dolerite Properties and Composition
Dolerite, diabase, or formally microgabbro, is a dark-colored, medium-grained subvolcanic rock equivalent to basalt or gabbro in composition. Subvolcanic or
Dolerite, diabase, or formally microgabbro, is a dark-colored, medium-grained subvolcanic rock equivalent to basalt or gabbro in composition. Subvolcanic or
Basalt is a mafic or dark-colored, volcanic or extrusive igneous rock. Mafic refers to rocks high in dark-colored minerals rich
Thundereggs or thunder eggs are nearly spherical structures or rocky bodies filled with mineral masses or crystals in rhyolite volcanic
Druses are small to medium irregular cavities in rocks lined by small, well-formed clusters or aggregates of projecting crystals, usually
Vugs are small to medium irregular cavities, pores, or voids in rocks often lined with mineral crystals whose composition differs
Amygdales are small, round, or almond-shaped vesicles partly or fully filled with secondary minerals common in mostly volcanic or extrusive
Amygdaloidal basalts are basalt rocks with vesicles partially or fully filled with secondary minerals. The filled vesicles are called amygdales,
Sheeting, exfoliation, or unloading is a physical weathering process. It happens when deeply buried rocks break into concentric slabs or
Salt weathering or salt crystal growth is physical or mechanical weathering. It is caused by the growth, expansion, or hydration
Ice or frost wedging is a mechanical or physical weathering process. It happens when water repeatedly seeps into rock cracks