Ooids (/ ˈoʊˌɔɪd /, [1] from Ancient Greek ᾠόν (ōión) 'egg stone') [2] are small (commonly ≤2 mm in diameter), spheroidal, "coated" (layered) sedimentary grains, usually composed of calcium …

2024年7月1日 · Ooids are concentrically-laminated, sedimentary grains produced through successive stages of carbonate precipitation and abrasion that typically form above wave base …

2019年3月1日 · Ooids are spherical or ovoidal carbonate grains (typically <2 mm in diameter) of smooth, well-laminated cortices that accrete around a nucleus, typically a bioclast, peloid, …

2019年8月30日 · Ooids, pisoids, oncoids and pelloids comprise the most common non-skeletal component of limestones. The first three are characterized by enveloping laminations that …

Ooids are small rounded accretionary mineralized bodies. They could be called sand grains, but they are no ordinary sand grains. Just like normal sand grains, ooids have a diameter reaching …

2018年1月29日 · Here we investigate a rare and beautiful geophysical problem that combines both of these processes; the shape evolution of carbonate particles known as ooids.

Common ooid nuclei are peloids and fragments of Halimeda, red algae, and mollusks. You might find these chapters and articles relevant to this topic. Most Upper Jurassic reservoirs are …

OOIDS are a distinctive type of sand that usually form on the sea floor. After they have been buried under additional sediment, such sand grains can be fused into a solid mass of …

Coated grains include oolites, pisolites, oncoids, and oncolites. oolites (figure below) are formed by a series of concentric layers surrounding a nucleus. They generally form in agitated marine …

The chemical and physical characteristics of ooids record essential details of the carbonate chemistry and hydrodynamic conditions of their depositional environment. As a result, ooids …