brown pyroclastic with porphyrite
Pyroclastic is a porous, light pyroclastic rock formed by rapid cooling after the eruption of basaltic magma. Black, dark gray or brown (depending on the degree of oxidation). Rich in pores (bubbles), loose texture, low density. Basalt, containing pyroxene, plagioclase and other dark minerals.
Volcanic breccia
Volcanic breccia is a conglomerate formed by volcanic activity with angular and sub angular gravel content>50%. The diameter is generally greater than 4 millimeters, and the lava fragments contained are mostly tuff, with fewer glass fragments and whole stones. It is mainly composed of volcanic breccia with a particle size of 2-64 millimeters, and also contains breccia from other rocks and a small amount of mineral crystal fragments such as quartz and feldspar.
Volcanic breccia
Volcanic breccia is a conglomerate formed by volcanic activity with angular and sub angular gravel content>50%. The diameter is generally greater than 4 millimeters, and the lava fragments contained are mostly tuff, with fewer glass fragments and whole stones. It is mainly composed of volcanic breccia with a particle size of 2-64 millimeters, and also contains breccia from other rocks and a small amount of mineral crystal fragments such as quartz and feldspar.
Tuff
Tuff: It is a type of volcanic debris rock, composed of volcanic debris material with more than 50% of particles with a diameter less than 2 millimeters. The main component is volcanic ash, with a loose, rough or dense appearance. Layered tuff is called layered tuff; Due to different ingredients, the colors are diverse, including purple red, gray white, gray green, etc.
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