(geology) Rocks that have retained their character from nearly 4.6 × 109 years ago, when planets were still occulting out of the cloud of dust and gas referred to as the solar nebula; examples are meteorites and asteroids.
Genesis Rock
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The Genesis rock is a lunar rock brought to Earth by Apollo 15. It is approximately 4.15 billion years old, which is only 0.5 billion years younger than the generally accepted age of the moon.
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| Wikipedia: Genesis Rock |
The Genesis Rock is a sample of original lunar crust from around the time the moon was born. It was retrieved from the Moon by Apollo 15 astronauts James Irwin and David Scott.
Chemical analysis of the Genesis Rock indicates that the rock is an anorthosite, composed mostly of the plagioclase feldspar, anorthite. The rock was formed in the early stages of the solar system, at least 4 billion years ago.[1] It was recovered in a crater of the Moon, near other rocks of its kind.
See also
References
- ^ Apollo 15 samples overview Lunar and Planetary Institute
External links
- Lunar and Planetary Institute - Apollo 15
- NASA - Apollo 15
- Discovering the Genesis Rock (From the Apollo Lunar Surface Journal, scroll down to 145:41:48.)
- Astronaut Scott examines the Genesis rock. (image)
- An overview of the samples collected by Apollo 15. (The Genesis Rock is sample #15415 and is described but not listed by its number.)
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