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Posts tagged: geology

hanjeanwat:

Hexagonal rocks-WUT: The columns form due to stress as the lava cools. The lava contracts as it cools, forming cracks. Once the crack develops it continues to grow. The growth is perpendicular to the surface of the flow. Entablature is probably the result of cooling caused by fresh lava being covered by water. The flood basalts probably damned rivers. When the rivers returned the water seeped down the cracks in the cooling lava and caused rapid cooling from the surface downward. The division of colonnade and entablature is the result of slow cooling from the base upward and rapid cooling from the top downward. (via Hexagonal rocks)

hanjeanwat:

Hexagonal rocks-WUT: The columns form due to stress as the lava cools. The lava contracts as it cools, forming cracks. Once the crack develops it continues to grow. The growth is perpendicular to the surface of the flow. Entablature is probably the result of cooling caused by fresh lava being covered by water. The flood basalts probably damned rivers. When the rivers returned the water seeped down the cracks in the cooling lava and caused rapid cooling from the surface downward. The division of colonnade and entablature is the result of slow cooling from the base upward and rapid cooling from the top downward. (via Hexagonal rocks)

psychogolem:

Marvelous Bismuth shapes.

tigrismedve:

Rare metals - Bismuth (2x), Fluorite, Malachite, Azurite/Malachite, Pietersite, Hafnium

thedailywhat:

A New Perspective of the Day: This is What a Volcanic Eruption Looks Like from Space

Here’s a striking view of Sarychev Volcano in Kuril Islands of Japan going through its early stage of eruption, taken from the orbit of the International Space Station in June 2009. For more info on this picture, head over to NASA’s Earth Observatory!

thedailywhat:

A New Perspective of the Day: This is What a Volcanic Eruption Looks Like from Space

tesseract

tesseract