Dacite (/ ˈdeɪsaɪt /) is a volcanic rock formed by rapid solidification of lava that is high in silica and low in alkali metal oxides. It has a fine-grained (aphanitic) to porphyritic texture and is …

Dacite is a fine-grained igneous rock that is normally light in color. It is often porphyritic. Dacite is found in lava flows, lava domes, dikes, sills, and pyroclastic debris. It is a rock type usually …

Sep 14, 2023 · Dacite is a fine-grained, light-colored volcanic or extrusive igneous rock. Its composition is felsic and mainly has plagioclase feldspar, quartz, lesser alkali feldspar, minor …

Dacite forms when viscous, felsic lava rapidly cools at or near the Earth’s surface, negating the opportunity for the formation of large crystals in the groundmass. This most commonly occurs …

Dacite, volcanic rock that may be considered a quartz-bearing variety of andesite. Dacite is primarily associated with andesite and trachyte and forms lava flows, dikes, and sometimes …

May 10, 2024 · Considering mineral and chemical composition, dacite is the extrusive equivalent of granodiorite, a plutonic or intrusive igneous rock. How does dacite form? Dacite forms when …

Dacite lavas are viscous and tend to form thick blocky lava flows or steep-sided piles of lava called lava domes. Dacitic magmas tend to erupt explosively, thus also ejecting abundant ash …

Dacite, from Dacia, a Roman province, Transylvania, Romania, is a volcanic rock that may be considered a quartz-bearing variety of andesite. Dacite is primarily associated with andesite …

Dacitic rocks with felsics comprising >20% quartz and alkali feldspar/plagioclase <0.5. A fine-grained extrusive rock with a similar general composition to andesite, but having a more sodic …

The host rock is dacite –quartz-feldspar porphyry intruded into volcanic andesite, andesite breccia, conglomerate, sandstone, and tuff. The basement rocks are granite, schist, and gneiss.