1 Monday: The Garden Grove forecast for Oct 19 is 79 degrees and Partly Cloudy. 2  There is 48 percentage chance of rain and 6 mph winds from the Southwest. 3  Tuesday: The Garden Grove forecast for Oct 20 is 84 degrees and Sunny.
Pumice (pronunciation: /ËpÊmáµ»s/), called pumicite in its powdered or dust form, is a volcanic rock that consists of highly vesicular rough textured volcanic glass, which may or may not contain crystals. It is typically light colored.
No pumice is not a porphyritic igneous rock, a porphyritic rock is characterized by the presence of phenocrysts (large mineral grains) and very small mineral grains with none â¦ in between. This implies that there was two different stages of cooling. Pumice is an extrusive igneous rock that cooled very quickly.