'earth samples' is correct and usable in written English.
It is typically used to refer to pieces of material (e.g., soil, rocks, air, water, etc.) that are collected from Earth's surface to study or analyze. For example, "The scientists collected earth samples from the region to investigate the effects of climate change."
A simplified method to measure the suction within rammed earth samples has been developed and validated.
The first mission, Stardust, was launched in 1999 and is to visit Comet Wild 2 in 2004 and bring back to Earth samples of dust and gas.
We also collected fine earth samples from glacier surfaces and crevices of glacial debris in the moraine zone.
"They took air samples, earth samples, dust samples and so on, in order to be tested in the Unscom laboratory in Baghdad.
In order to gain a deeper understanding of the additional causes influencing the strength of rammed earth samples, investigations on specimen slenderness, size, shape and capping methods have been also conducted.
The officials said Mr. McVeigh was in Kingman at the time of the explosion, and investigators were studying earth samples and bomb fragments collected from the scene of the blast, which blew out windows in several homes but caused no injuries.
The "JOIDES Resolution," operated by Texas A & M University for the Joint Oceanographic Institutions for Deep Earth Sampling, represents a major advance in research vessels.
In the 1960s the Joint Oceanographic Institutions for Deep Earth Sampling deep-drilling project penetrated the entire thickness of sediment in the Atlantic.
An extensive series of boreholes drilled into the seafloor under the Joint Oceanographic Institutions for Deep Earth Sampling (JOIDES) program has established a relatively simple picture of the crust beneath the oceans (see also undersea exploration).
One-dimensional compression tests are carried out on material sampled during the R/V POLARSTERN cruise ANT XXIX/4 to a landslide-prone area of the South Sandwich Trench, and on generic clayey-silt - diatomaceous earth sample mixtures.
Earthen A Cold Earth Sampler.
