posted on May, 18 2018 @ 01:16 PM
a reply to: seagull
Below sea level these Hawaiian volcanoes are made up of Palagonites. We also call these, pillow basalts. They have cruddy yellowish textures.
Nowhere near the strength of basalt "gems". Those are the five sided crystals, which ring, if they're not cracked. Devil's Tower, in Wyo. is a good
example of this. Underwater edifices will look like bunches of grapes, rather then the columnar basalts in Devil's Tower.
Today is the 38th Anniversary of Mt. St. Helen's last big blowout. Let's all hope that no one gets killed in these Hawaiian eruptions.