The phrase "samples of rocks" is correct and usable in written English.
You can use it when referring to rock samples, either literal physical samples of rocks, or figurative samples of something (such as a types of behavior or a style of writing). For instance, you might say, "The professor showed us samples of rocks from around the world."
In the new research, Dr. Ellwood and his colleagues examined samples of rocks from Morocco.
Children will be able to put on a safety helmet and dig out samples of rocks and minerals like stalactites and stalagmites that they can then analyze in a lab with experts.
Subsequent drilling in guyots west of Hawaii confirmed this view; samples of rocks from the tops contained fossils of Cretaceous age representing reef-building organisms of the kind that inhabit shallow water.
It also has robotic arms, allowing him to collect samples of rocks and soils, and a team of researchers are working alongside the director to identify any new species.
They did it by analyzing previous seismic data and testing the effects of seismic waves on lab samples of rocks of varying density, composition, and temperature found in Earth's crust.
This lends justification to the approach to study samples of rocks, which have experienced a burial and diagenetic or metamorphic history comparable to those hosting the seismogenic zone at depth.
It will drill out samples of rock and deliver scoops of Martian soil to miniature laboratories for analysis.
Because of their abundance and minute size, microfossils can be extracted from small samples of rock secured in drilling operations.
The company is building a test well to enable it to take samples of rock from about 3,000ft below the picturesque South Downs.
It has a manipulator hand containing drilling and cutting tools that allow the robot to retrieve samples of rock from the ocean bed.
Now, using geochemical techniques, Bevins and his colleagues have compared samples of rock and debris from Stonehenge with data from the Preseli site and concluded the bluestones in fact came from Carn Goedog.
