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.
Stone Age. The Stone Age was a time in history when early humans used tools and weapons made out of stone. It lasted from when the first stone tools were made, by our ancestors, about 3.4 million years ago until the introduction of metal tools a few thousand years ago. The Stone Age is divided into three periods and the exact dates for each period vary across the world.