Sandstone vs Arkose Characteristics Though some rocks look identical, they have certain characteristics which distinguish them from others. Characteristics of rocks include texture, appearance, color, fracture, streak, hardness etc. Sandstone vs Arkose characteristics assist us to distinguish and recognize rocks.
The first such period is referred to as the Paleolithic, or Old Stone Age. The Old Stone Age began about 2 million years ago with the development of the first tools by Homo habilis and lasted until around 12,000 years ago.
The cultural period of the Stone Age that began about 2 million years ago, marked by the earliest use of tools made of chipped stone. The Paleolithic Period ended at different times in different parts of the world, between about 40,000 and 10,000 years ago. Compare Mesolithic, Neolithic.