Sedimentary rocks are types of rock that are formed by the deposition of material at the Earth's surface and within bodies of water. Sedimentary rocks have also been found on Mars. Sedimentation is the collective name for processes that cause mineral and/or organic particles (detritus) to settle and accumulate or minerals to precipitate from a solution. Particles that form a sedimentary rock by accumulating are called sediment. Before being deposited, sediment was formed by weathering and erosion in a source area, and then transported to the place of deposition by water, wind, ice, mass movement or glaciers, which are called agents of denudation.

The sedimentary rock cover of the continents of the Earth's crust is extensive, but the total contribution of sedimentary rocks is estimated to be only 8% of the total volume of the crust. Sedimentary rocks are only a thin veneer over a crust consisting mainly of igneous and metamorphic rocks. Sedimentary rocks are deposited in layers as strata, forming a structure called bedding. The study of sedimentary rocks and rock strata provides information about the subsurface that is useful for civil engineering, for example in the construction of roads, houses, tunnels, canals or other structures. Sedimentary rocks are also important sources of natural resources like coal, fossil fuels, drinking water or ores.

Wadd (Arabic: ود‎) was the Minaean moon-god. Snakes were associated with him. An altar dedicated to him was erected by Minaeans living on the Greek island of Delos. The altar contains two inscriptions, one of which is in Minaean language and the other in Greek. Minaean inscription on the altar begins with symobols of three Minaean god one of which is of Wadd whose symbol is a snake. The Minaean text text on the altar reads, "Hāni' and Zayd'il [of the lineage] of Hab erected the altar of Wadd and of the deities of Ma'in at Delos." The Greek inscription reads, "[Property] of Oaddos, god of the Minaeans. To Oaddos." He was also worshipped by Minaean colonists in Dedan (modern-day Al-`Ula) during the Lihyanite rule. A temple of Wadd evidently existed in Dedan. There is evidence from Minaean inscriptions of the presence of Levites in the temple of Wadd who according to some scholars were either as priests or cult servants who could later be promoted to higher positions.

The Banu Kalb tribe worshipped Wadd in the form of a man and is said to have represented heaven.

Amm or AMM may refer to:

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Museum

Science, technology, and medicine

Transportation

Entertainment

Television

Video games

Religion

Organizations

Amm was a moon god worshipped in ancient Qataban, in what is now south Arabia. The inhabitants of the kingdom referred to themselves as the Banu Amm, or the "Children of Amm". He was also revered as a weather god, as his attributes included lightning bolts. His consort is the goddess Asherah.

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