Calcareous (/kælˈkɛəriəs/) is an adjective meaning "mostly or partly composed of calcium carbonate", in other words, containing lime or being chalky. The...

The calcareous sponges (class Calcarea) are members of the animal phylum Porifera, the cellular sponges. They are characterized by spicules made of calcium...

Calcareous grassland (or alkaline grassland) is an ecosystem associated with thin basic soil, such as that on chalk and limestone downland. Plants on calcareous...

A calcareous glade is a type of ecological community that is found in the central Eastern United States. Calcareous glades occur where bedrock such as...

Calcareous dinoflagellate cysts or calcareous dinocysts are dinoflagellate cysts produced by a group of peridinoid dinoflagellates, called calcareous...

Calcareous nannofossils are a class of tiny (less than 30 microns in diameter) microfossils that are similar to coccoliths deposited by the modern-day...

J.J. Amann – Arizona calcareous moss Mnium blyttii Bruch & Schimp. – Blytt's calcareous moss Mnium hornum Hedw. – horn calcareous moss Mnium jungermannia...

Limestone Alps (German: Nördliche Kalkalpen), also called the Northern Calcareous Alps, are the ranges of the Eastern Alps north of the Central Eastern...

Calcareous sinter is a freshwater calcium carbonate deposit, also known as calc-sinter. Deposits are characterised by low porosity and well-developed lamination...

Sud-orientali, German: Südliche Kalkalpen), also called the Southern Calcareous Alps, are the ranges of the Eastern Alps south of the Central Eastern...

Raphidonema is an extinct genus of calcareous sponges. This genus is known in the fossil records from the Cretaceous period of France and United Kingdom...

Lime is an inorganic material composed primarily of calcium oxides and hydroxides. It is also the name for calcium oxide which occurs as a product of coal-seam...

gypsum – see the variety called "onyx-marble", actually a travertine Calcareous sinter – Freshwater calcium carbonate deposit Calthemite – Secondary calcium...

ooze are siliceous, which is composed primarily of silica (SiO2), and calcareous or carbonate, which is mostly calcium carbonate (CaCO3). In an area in...

Morphology can vary from mineratrophic wetlands to spring aprons (see calcareous sinter) Braided channel – Deposits form within a fluvial channel, dominated...

The Limestone Alps (German: Kalkalpen) are sub-mountain range of the Alps in Central Europe. They are of economic importance, including as a watershed...

Calcite is a carbonate mineral and the most stable polymorph of calcium carbonate (CaCO3). It is a very common mineral, particularly as a component of...

the Entre-Deux-Mers region of Bordeaux. Brickearth – See under Loess. Calcareous soil – Alkaline soil with high levels of calcium and magnesium carbonate...

Arturia canariensis, commonly known as the yellow calcareous sponge, is a species of sponge in the family Clathrinidae. It is found in shallow seas in...

The Southern Ridge and Valley / Cumberland dry calcareous forest is a forest system found in Alabama, Georgia, Tennessee, Kentucky, Virginia, and West...

Mnium stellare, the starry thyme-moss or stellar calcareous moss, is a moss species in the genus Mnium. Edwards, Sean R. (2012). English Names for British...

water loss than a thin mucus epiphragm would be. This very sturdy flat calcareous structure has a small perforation to allow for oxygen exchange. Helix...

Serpula vermicularis, known by common names including the calcareous tubeworm, fan worm, plume worm or red tube worm, is a species of segmented marine...

The dinaric calcareous silver fir forests are an endemic vegetation type of the littoral Dinaric Alps, located in the Dinaric Mountains mixed forests ecoregion...

The Calcareous Grit is a geologic formation in England. It preserves fossils dating back to the Jurassic period. Earth sciences portal England portal Paleontology...

and the construction of the metazoan body plan. Sponge spicules can be calcareous or siliceous. Siliceous spicules are sometimes embedded in spongin. Spicules...

of Santa Barbara Calcareous Skeletons A Radiolarian of the family Bagotidae Canoptum C. poissoni North of Santa Barbara Calcareous Skeletons A Radiolarian...

Sycon is a genus of calcareous sponges belonging to the family Sycettidae. These sponges are small, growing up to 7.5 cm with a length from 2.5 to 7.5 cm...

This is usually made of a horn-like material, but in some molluscs it is calcareous. In the land slugs, the shell is reduced or absent, and the body is streamlined...

silica spicules, whereas some species have calcium carbonate exoskeletons. Calcareous sponges have calcium carbonate spicules and, in some species, calcium...