2007-02-11 06:51:54 · 4 answers · asked by jola2fine 2 in Science & Mathematics ➔ Earth Sciences & Geology
The most porous igneous specimen is not commonly known to humans, but in fact, and under closer examination, the rock formation humans commonly refer to as "pumis". This so-called rockformation is actually a biological entity.
2007-02-11 06:56:11 · answer #1 · answered by newfoundlander 1 · 0⤊ 0⤋
Igneous rocks most porous are cooled lava and pumice.
2007-02-11 06:58:47 · answer #2 · answered by Anonymous · 0⤊ 0⤋
Solidified lava "froth", namely Pumice.
Other types of lava (with gas bubbles or vesicles), and rubble (agglomerate) can also be porous, to a lesser degree.
2007-02-11 08:03:57 · answer #3 · answered by grpr1964 4 · 0⤊ 0⤋
the ones that cool the quickest under the least amount of pressure.
Pumice comes to mind.
2007-02-11 06:57:20 · answer #4 · answered by m34tba11 5 · 0⤊ 0⤋