According to material scientist Patrick Richard, "Granular materials are ubiquitous in nature and are the second-most manipulated material in industry (the first one is water)".
Granular material, such as clay, sand and slit, was carried into the ancient ocean by rivers that existed during the Cretaceous period.
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Analysis of Apollo 14 samples suggests that there are five major geologic constituents present in the immediate landing area: regolith breccias, fragmental breccias, igneous lithologies, granulitic lithologies, and impact-melt lithologies.