74220 (286) Orange Spherule Regolith
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Fact sheet
Description: 

Sample 74220 is an unusual soil sample that was discovered at Shorty Crater during the Apollo 17 mission to the Moon. The sample is part of the splatter from a volcanic eruption on the Moon that formed a pyroclastic deposit, and has the same age as the lunar Mare basalts – 3.6 billion years old.

Most of the sample consists of orange glass spheres, although a proportion of the glass has devitrified and is now black where fine olivine needles and ilmenite feathers have grown. Compositionally the black ‘glass’ is identical to the orange glass.

Further details of this and other Apollo samples are here: http://curator.jsc.nasa.gov/lunar/

In Place
In Time
Location description: 
Apollo 17 Shorty Crater
Accuracy:
Location precision: 
Good
Timescale:
Not known
Ma = Millions of years ago
In Focus
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Type:
Type: 
igneous
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