Oolite in the context of "Chamosite"

Bath Stone is an oolitic limestone comprising granular fragments of calcium carbonate originally obtained from the Middle Jurassic aged Great Oolite Group of the Combe Down and Bathampton Down Mines under Combe Down, Somerset, England. Its honey colouring gives the World Heritage City of Bath, England, its distinctive appearance. An important feature of Bath Stone is that it is a 'freestone', so-called because it can be sawn or 'squared up' in any direction, unlike other rocks such as slate, which form distinct layers.

Bath Stone has been used extensively as a building material throughout southern England, for churches, houses, and public buildings such as railway stations.

Ooids (/ˈoʊˌɔɪd/, from Ancient Greek ᾠόν (ōión) 'egg stone') are small (commonly ≤2 mm in diameter), spheroidal, "coated" (layered) sedimentary grains, usually composed of calcium carbonate, but sometimes made up of iron- or phosphate-based minerals. Ooids usually form on the sea floor, most commonly in shallow tropical seas (around the Bahamas, for example, or in the Persian Gulf). After being buried under additional sediment, these ooid grains can be cemented together to form a sedimentary rock called an oolite. Oolites usually consist of calcium carbonate; these belong to the limestone rock family. Pisoids are similar to ooids, but are larger than 2 mm in diameter, often considerably larger, as with the pisoids in the hot springs at Carlsbad (Karlovy Vary) in the Czech Republic. Ooids have been the subject of scientific research for centuries.

Cleeve Hill (also known as Cleeve Cloud) is the highest point both of the Cotswolds hill range and of the county of Gloucestershire, at 330 m (1,080 ft). It is located on Cleeve Common, which is a Site of Special Scientific Interest (SSSI) looked after by a small charity called Cleeve Common Trust (formally Cleeve Common Board of Conservators). It commands a clear view to the west, over Cheltenham and the racecourse, over the River Severn and into Wales; and to the north over Winchcombe. It is a conspicuous outcrop on the edge of the limestone escarpment, (sometimes called the "Cotswold Edge"). It is crossed by the Cotswold Way footpath.

With the hill's south slopes draining to the River Coln, Cleeve Hill is the highest point in the drainage basin of the River Thames.

A freestone is a type of stone used in masonry for molding, tracery and other replication work required to be worked with the chisel. Freestone, so named because it can be freely cut in any direction, must be fine-grained, uniform and soft enough to be cut easily without shattering or splitting. Some sources, including numerous nineteenth-century dictionaries, say that the stone has no grain, but this is incorrect. Oolitic stones are generally used, although in some countries soft sandstones are used; in some churches an indurated chalk called clunch is employed for internal lining and for carving.

Some have believed that the word "freemason" originally referred, from the 14th century, to a person capable of carving freestone.

The Tendaguru Formation, or Tendaguru Beds are a highly fossiliferous formation and Lagerstätte located in the Lindi Region of southeastern Tanzania. The formation represents the oldest sedimentary unit of the Mandawa Basin, overlying Neoproterozoic basement, separated by a long hiatus and unconformity. It reaches a total sedimentary thickness of more than 110 metres (360 ft). The formation ranges in age from the late Middle Jurassic to the Early Cretaceous, Oxfordian to Hauterivian stages, with the base of the formation possibly extending into the Callovian.

The Tendaguru Formation is subdivided into six members; these are from oldest to youngest the Lower Dinosaur Member, the Nerinella Member, the Middle Dinosaur Member, the Indotrigonia africana Member, the Upper Dinosaur Member, and the Rutitrigonia bornhardti-schwarzi member. The succession comprises a sequence of sandstones, shales, siltstones, conglomerates with minor oolitic limestones, deposited in an overall shallow marine to coastal plain environment, characterized by tidal, fluvial and lacustrine influence with a tsunami deposit occurring in the Indotrigonia africana member. The climate of the Late Jurassic and Early Cretaceous was semi-arid with seasonal rainfall and the eustatic sea level was rising in the Late Jurassic from low levels in the Middle Jurassic. Paleogeographical reconstructions show the Tendaguru area was located in the subtropical southern hemisphere during the Late Jurassic.

The Rollright Stones are a complex of three Neolithic and Bronze Age megalithic monuments near the village of Long Compton, on the borders of Oxfordshire and Warwickshire. Constructed from local oolitic limestone, the three monuments, now known as the King's Men and the Whispering Knights in Oxfordshire and the King Stone in Warwickshire, are distinct in their design and purpose. They were built at different periods in late prehistory. During the period when the three monuments were erected, there was a continuous tradition of ritual behaviour on sacred ground, from the 4th to the 2nd millennium BCE.

The first to be constructed was the Whispering Knights, a dolmen that dates to the Early or Middle Neolithic period. It was likely to have been used as a place of burial. This was followed by the King's Men, a stone circle that was constructed in the Late Neolithic or Early Bronze Age; unusually, it has parallels to other circles located further north, in the Lake District, implying a trade-based or ritual connection. The third monument, the King Stone, is a single monolith. Although its construction has not been dated, the dominant theory amongst archaeologists is that it was a Bronze Age grave marker.