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C.2.2. Rocky surfaces hero

Rocky surfaces

Rocky surfaces

  • Exhibition Text

    • As newly formed planets melt, rocky material rises toward the surface, forming a mantle and crust.

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  • For Educators

    • Topic: Astronomy

      Subtopic: Planets

      Keywords: Astrophysics, Planets--Origin, Rocks, Astrogeology, Planets--Geology

      Audience: General

In This Section

C.2.2.1. Cumberland Falls

Cumberland Falls

The large crystals in Cumberland Falls formed inside a partially molten aubrite asteroid, while the two black clasts, or fragments, come from a chondritic asteroid that never melted.

C.2.2.2. Peña Blanca Springs.

Peña Blanca Springs

The Peña Blanca Springs meteorite belongs to a group, the aubrites, whose chemical composition has led to speculation that they came from the innermost asteroid belt, or possibly even the planet Mercury.

C.2.2.3. Kenna. Less melting


Kenna, a ureilite, comes from an asteroid that did not completely differentiate. 

C.2.2.4. Johnstown. More melting


The Johnstown meteorite comes from a large asteroid, probably Vesta, that melted and differentiated.

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