Carbonated palagonite tuff
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Fact sheet
Description: 

Darwin wrote "Calcareous sandstone, concretions in above (referring to 2114-2116) - Pale brown indurated earthy stone with white fragments, forming a breccia".

This fragmental rock consists of rock, mineral and glassy material which was produced when basaltic lava interacted with sea-water during eruption. Palagonite is the alteration product of glassy basalt which in places is tinted yellow, suggesting later weathering. Sample Location: Chiloe Island, Chile. Collected June-July 1834.

In Place
In Time
Location description: 
Chiloe Island, Chile
Accuracy:
Location precision: 
Moderate
Timescale:
Not known
Ma = Millions of years ago
In Focus
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Type:
Type: 
igneous
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