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A gastrolith, also called a stomach stone or gizzard stone, is a rock held inside a gastrointestinal tract. Gastroliths in some species are retained in the muscular gizzard and used to grind food in animals lacking suitable grinding teeth. In other species the rocks are ingested and pass through the digestive system and are frequently replaced.
Geophagia (/ ˌ dʒ iː ə ˈ f eɪ dʒ (i) ə /), also known as geophagy (/ dʒ i ˈ ɒ f ə dʒ i /), [1] is the intentional [2] practice of consuming earth or soil-like substances such as clay, chalk, or termite mounds.
Calabash chalk is a naturally occurring material composed of fossilized sea shells. However, it can be prepared artificially by combining clay, sand, wood ash and even salt. By molding and heating this mixture, the calabash chalk is obtained. [5] It is available as a powder, a molded shape or a block. [4] [5]
The northern margin of the basin was formed by a series of normal faults, against what was then an area of land, known to geologists as the London-Brabant Massif. The Weald Basin gently subsided throughout the Jurassic, Cretaceous and Early Palaeogene leading to a thick succession of sedimentary rocks being deposited.
The Gazzi-Dickinson method came out of separate work by P. Gazzi in 1966 [1] and William R. Dickinson, starting in 1970. [2] [3] Dickinson and his students (most notably Raymond Ingersoll, Steven Graham, and Chris Suczek) [4] [5] [6] at Stanford University in the 1970s established the method and its use to use the composition of sandstones to infer tectonic processes.
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Pica: What’s in a Name? The behavior of eating non-food items is broadly referred to as pica. Items ingested may vary from toys to house plants, marbles, coins, wood, plastic, rocks, underwear ...
The lugworm Arenicola marina Gobies keeping watch outside a shrimp burrow. The evaluation of the ecological role of bioturbators has largely been species-specific. [8] However, their ability to transport solutes, such as dissolved oxygen, enhance organic matter decomposition and diagenesis, and alter sediment structure has made them important for the survival and colonization by other ...