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 Stone Age was a time in prehistory when humans made and used stone tools. (Prehistory is the time before people invented writing.) Early humans began using stones as simple tools about 2 million years ago. Humans used mainly stone tools until about 10,000 years ago.