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.
Of or relating to the cultural period of the Stone Age beginning around 10,000 BC in the Middle East and later elsewhere, characterized by the development of agriculture and the making of polished stone implements. The Neolithic Period. Also called New Stone Age. See Usage Note at Three Age system.