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 Paleolithic era is defined by the appearance and development of the earliest cultures to use stone tools. The Stone Age as a larger category is divided into three eras: the Paleolithic, the oldest Stone Age, the Mesolithic, or middle Stone Age, and the Neolithic, or new Stone Age.