Anderson's expression was as stony as one of his geological samples.

They were not able to land, but dredged the seabed for geological samples.

The Soviets also suggested that provisions be made for visits to each site to take geological samples and observe test preparations.

He built up a large collection of geological and botanical samples there and established a library.

He liked to wander off into the canyons, collecting fossils and geological samples.

His research led to the founding of a laboratory in 1957 to provide dating for archaeological and geological samples.

For at least three decades, scientists have advocated the return of geological samples from Mars.

The Museum, next to the church, has local memorabilia, historical artefacts, and geological samples.

Here members of the expedition took geological and botanical samples.

The crystalline form is usually found in geological samples.