What Do Pumice And Obsidian Have In Common

Pumice is a common product of explosive eruptions plinian and ignimbrite forming and commonly forms zones in upper parts of silicic lavas.

Rhyolite has the same mineral composition as andesite. If we don t have your question don t worry. Obsidian is a naturally occurring volcanic glass formed as an extrusive igneous rock. Pumice has a porosity of 64 85 by volume and it floats on water possibly for years until it is eventually waterlogged and sinks.

Mineral grains are too small to be visible without a magnifying lens or microscope. Which of the following best describes an aphanitic texture. The rock is crystalline. Bubbles from volatiles are frozen in place.

Obsidian was so valued for these uses that ancient people mined transported and traded obsidian and obsidian objects over distances of up to a thousand miles. The answer is c pumice is a fine grained intrusive igneous rock while obsidian is a coarse grained extrusive igneous rock bolivianouft and 9 more users found this answer helpful 4 0 4 votes. Scoria differs from pumice in being denser. Which igneous rock or magma has the lowest silica sio2 content.

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Read 512 times 3 replies report replies. Which of the following igneous rocks exhibit aphanitic texture. Pumice forms from rapidly cooling lava containing volatiles water and gas and obsidian forms from rapidly cooling lava that doesn t contain volatiles. An texture would be most likely to occur in an extrusive igneous rock.

Which of the following best describes an aphanitic texture. What do pumice and obsidian have in common. It is produced when felsic lava extruded from a volcano cools rapidly with minimum crystal growth pumice is a volcanic rock that consists of highly vesicular rough textured volcanic glass which may or may not contain crystals 1 2 history. What do pumice and obsidian have in common.

What do pumice and obsidian have in common. The rock is crystalline. An texture would be most unlikely to occur in an extrusive igneous rock. Answer accepted by topic starter.

Archaeologists have been able to document the geography of this trade by matching the characteristics of obsidian in outcrops with the characteristics of obsidian in cutting tools. A basaltic composition b glassy texture c ultramafic composition d phaneritic texture. Mineral grains are too small to be visible without a magnifying lens or microscope.