Moon rocks are usually gray. Some look like a chunk of concrete. Others are breccia, which is stone made of rock pieces melded together. But if these pebbles look like terrestrial pebbles ...

There’s also an anorthosite from Apollo 16, “an example of the really old Highland rocks on the moon,” says Strain, and a piece of breccia and soil samples from Apollo 17. “All together ...

This March, researchers analyzing an Apollo 14 breccia (a rock type composed of other rock fragments welded together) determined that one of those pieces might not be a moon rock at all.

known as glassy regolith breccia 15498, is composed of basalt shards, partially covered in melted glass, and dates back 1 billion to 2.5 billion years. Igneous rocks, both on Earth and the moon ...

A sample rock found on the Moon was tested by scientists and reported ... during its incorporation into the Imbrium ejecta and host breccia." One way or the other, this rock likely formed between ...

The 3.9 billion-year-old sample, a type of rock called an impact melt breccia, tells the catastrophic tale of the last great asteroid impact on the near side of the moon. When a meteor or asteroid ...

an igneous rock rich in feldspar and believed to be the remains of the primordial crust of the Moon , and are dated to 4.5 to 3.9 billion years. The regolith and lunar-breccia formed by the ...

[Apollo 16: NASA's 5th Moon Landing with Astronauts in Pictures ... finding only sedimentary breccia rocks, which are rocks composed of various mineral fragments, and not the volcanic ones ...

A fist-size meteorite named Sayh al Uhaymir 169 experienced three lunar impacts while on the Moon before a ... mostly of impact melt breccia. This is a common lunar rock type built from fragments ...

Packed within this lunar breccia is a 2-gram felsite clast ... we are still making discoveries about the Moon from rocks collected 48 years ago.” ...

It's a sample of lunar breccia — the geological term for a ... That uncertainty highlights the enduring gift of the moon rocks collected by the Apollo program astronauts between 1969 and 1972 ...