Chalk is not easily consolidated and the Chalk Group still consists of loose sediments in many places.

Ausia fenestrata is a curious Ediacaran period ( 630 – 542 million years ago ) fossil represented by only one specimen 5 cm long from the Nama Group of Namibia and it has similarity to Burykhia from Ediacaran ( Vendian ) siliciclastic sediments exposed on the Syuzma River of northern Russia.

The remediation of the former Union Carbide site, the former Allied Feeds site and a strip of heavily dioxin contaminated sediments in Homebush Bay, have been the subject of extensive analysis, investigations and community activism, including by the Rhodes Peninsula Group.

The Ogallala Group is a late Neogene ( Pliocene ) sheet of sediments spread over the area east of the Rocky Mountains from Wyoming to Texas, rather recently in a geological sense, when the Colorado Plateau and Rocky Mountain regions were elevated from near sea level to about their current elevations.

Evaporating, the minerals were left behind to cement the otherwise fairly loose sandy sediments of the Ogallala Group.

The sediments that form the Fossil Bluff Group accumulated within a volcanic island arc, which now forms the bedrock backbone of the Antarctic Peninsula, in prehistoric floodplains and deltas and offshore as submarine fans and other marine sediments.

This is thought to have formed during Neogene to Quaternary weathering by the silicification of Upper Paleocene Lambeth Group sediments, resulting from acid leaching.

Since the Jurassic rocks occurred after the Triassic sediments of the Dockum Group, they could not have been reworked into the Dockum sediments as inclusions.

The plain of Lafonia is constituted by arenaceous sediments of the Lafonia Group.

Between these two blocks lies the uplifted horst block of West Rand Group sediments with no reef preserved.

The strata, in which it occurs, is a 3. 0 to 3. 1 billion year-old, over 2 kilometer-thick assemblage of arenaceous sediments, conglomerates, grits, basic volcanics, tuffs, coarse pyroclastic rocks and quartzite called the " Dominion Group ".

The Dyke is formed in rocks of the Chalk Group which originated as marine sediments during the Cretaceous period.

The latter fault zone is the eastern edge of the metamorphosed Proterozoic rocks of the Kanmantoo Group ; to the east lie the younger sediments of the Murray River.

Some of the stumps are as much as three feet long, but most of them have been flattened by the pressure of the overlying sediments.

Cap carbonates generally have a restricted geographic distribution ( due to specific conditions of their precipitation ) and usually siliciclastic sediments replace laterally the cap carbonates in a rather short distance and cap carbonates do not occur above every tillite elsewhere in the world.

The best index fossils are common, easy-to-identify at species level, and have a broad distribution — otherwise the likelihood of finding and recognizing one in the two sediments is minor.

For instance, a granite which is formed from melted sediments may have more alkali feldspar, whereas a granite derived from melted basalt may be richer in plagioclase feldspar.

The wrecks, and other archaeological sites that have been preserved have generally survived because the dynamic nature of the sea bed can result in artifacts becoming rapidly buried in sediments.

Vessels have been discovered where they have been preserved in sediments underwater or in waterlogged land sites, such as the discovery of a canoe near St Botolphs.

If water-saturated zones still exist in sediments under the volcano, they would likely have been kept warm by a high geothermal gradient and residual heat from the volcano's magma chamber.

Relics of the city were being found in the Wadden Sea until the late 20th century, but shifting sediments have carried the last of these into the sea.

Modern Awash River, Ethiopia, descendant of the Palaeo-Awash, source of the sediments in which the oldest Stone Age tools have been found

The oldest known stone tools have been excavated from several sites at Gona, Ethiopia, on the sediments of the paleo-Awash River, which serve to date them.

Carbon isotopes of lipids ( n-alkanes ) derived from leaf wax and lignin, and total organic carbon from two sections of lake sediments interbedded with the in eastern North America have shown carbon isotope excursions similar to those found in the mostly marine St. Audrie ’ s Bay section, Somerset, England ; the correlation suggests that the end-Triassic extinction event began at the same time in marine and terrestrial environments, slightly before the oldest basalts in eastern North America but simultaneous with the eruption of the oldest flows in Morocco ( Also suggested by Deenen et al., 2010 ), with both a critical greenhouse and a marine biocalcification crisis.

* The minerals which are taken from a rock to construct an isochron must have formed in chemical equilibrium with one another or in the case of sediments, be deposited at the same time ;

TDR is used to determine moisture content in soil and porous media, where over the last two decades substantial advances have been made ; including in soils, grains and food stuffs, and in sediments.

Three species of Loricifera have been found in the sediments at the bottom of the L ' Atalante basin in Mediterranean Sea, more than 3, 000 meters down, the first multicellular organisms known to spend their entire lives in an oxygen-free environment.

Apart from continental sediments, rift basins normally also have part of their infill consisting of volcanic deposits.

The best index fossils are common, easy-to-identify at species level, and have a broad distribution — otherwise the likelihood of finding and recognizing one in the two sediments is minor.

Water related sediments as old as 3. 8 billion years have been found.

These sediments have been dated through Chandronian NALMA

Originally thought to occur only in the outer regions of the Solar System where temperatures are low and water ice is common, significant deposits of methane clathrate have been found under sediments on the ocean floors of Earth.

Hydrates normally exclude the salt in the pore fluid from which it forms, and thus they have high electric resistivity just as ice and sediments containing hydrates have a higher resistivity compared to sediments without gas hydrates ( Judge ).

The saltwater plesiosaur Leurospondylus has been found in marine sediments in the Horseshoe Canyon, while freshwater environments were populated by turtles, Champsosaurus, and crocodilians like Leidyosuchus and Stangerochampsa.

In his paper, he explained his theory that the Earth must be much older than had previously been supposed in order to allow enough time for mountains to be eroded and for sediments to form new rocks at the bottom of the sea, which in turn were raised up to become dry land.

Salt water provides for greater organic activity than freshwater, and in particular, the shipworm, terredo navalis, lives only in salt water, so some of the best preservation in the absence of sediments has been found in the cold, dark waters of the Great Lakes in North America and in the ( low salinity ) Baltic Sea ( where the Vasa was preserved ).

The northwest coast is part of the deep Cauvery ( Kaveri ) River Basin of southeast India, which has been collecting sediments from the highlands of India and Sri Lanka since the breakup of Gondwanaland.

The fossil record of diatoms has largely been established through the recovery of their siliceous frustules in marine and non-marine sediments.

In fact, the salt sediments of many of these lake beds have been mined for many years for various salts, most notably borax ( this is most famously true for Owens Lake and Death Valley ).

Early fossil tetrapods have been found in marine sediments, and because fossils of primitive tetrapods in general are found scattered all around the world, they must have spread by following the coastal lines — they could not have lived in freshwater only.

Acritarchs have been recovered from sediments deposited as long as 3. 2 billion years ago, but at about 1 billion years ago they started to increase in abundance, diversity, size, complexity of shape and especially size and number of spines.

A large part of Kenya is underlain by Precambrian basement, while the Kenya rift basin ( a typical extensional basin ) hosts Tertiary volcanics that cover Mesozoic sediments ( Recently these sediments have been considered for oil exploration ).

Because of its location, sediments from both the flooding of the Tiber River and the erosion of the surrounding hills have been raising the level of the Forum floor for centuries.

Shocked quartz and intensely fractured quartz have been recovered from fractured and possibly altered sediments comprising its rim.

The originally horizontal sediments have been folded into an asymmetric anticline by later tectonic movements.