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In geology, rock (or stone) is any naturally occurring solid mass or aggregate of minerals or mineraloid matter. It is categorized by the minerals included, its chemical composition, and the way in which it is formed.
- Rock (Disambiguation)
Steinstossen, the Swiss variant of stone put, a competition...
- Stone
A stone is a piece of rock. It is a mass of hard, compacted...
- Stone (unit)
The stone or stone weight (abbreviation: st.) is an English...
- Rock (Disambiguation)
Apr 27, 2024 · Abbreviated as st . ( botany) The central part of some fruits, particularly drupes; consisting of the seed and a hard endocarp layer. ( medicine) A hard, stone-like deposit . ( board games) A playing piece made of any hard material, used in various board games such as backgammon and go.
Granite is a common stone on Earth, and makes up a big part of the crust (the Earth's outer layer). It is usually found in the continental plates of the Earth's crust. Although it forms under the surface of the Earth, there are many places where it has been forced upwards by tectonic movement.
The Stone Age was a broad prehistoric period during which stone was widely used to make stone tools with an edge, a point, or a percussion surface. The period lasted for roughly 3.4 million years and ended between 4,000 BC and 2,000 BC, with the advent of metalworking.
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Jul 18, 2014 · Paleolithic or Old Stone Age: from the first production of stone artefacts, about 2.5 million years ago, to the end of the last Ice Age, about 9,600 BCE. This is the longest Stone Age period. The main types of evidence are fossilized human remains and stone tools, which show a gradual increase in their complexity.
