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[70] [60] [71] [72] In addition to providing information about the orientation of past fluid flow in the host rock, elongate concretions can provide insight into local permeability trends (i.e., permeability correlation structure; variation in groundwater velocity, [73] and the types of geological features that influence flow.
The film uses a circular timetree of life generated by scientists S. Blair Hedges and Sudhir Kumar, from their TimeTree database, as a temporal framework for the production. The timetree was created using animated computer-generated imagery in scenes every 10 minutes during the 2-hour movie.
One common example is when manganese oxides crystallize with a characteristic tree-like or dendritic pattern along a rock fracture. The formation of frost dendrites on a window is another common example of this crystal growth. Concretions are sometimes thought to be fossils, and occasionally one contains a fossil, but are generally not fossils ...
Evidence that this mastodon was processed and cooked includes the presence of two sandstone knives with worked edges that were used to cut meat and/ or remove hide. A concretion representing a congealed mass of viscous fluid replaced by minerals, may represent fat drippings produced by cooking with fire.
A coal ball is a type of concretion, varying in shape from an imperfect sphere to a flat-lying, irregular slab.Coal balls were formed in Carboniferous Period swamps and mires, when peat was prevented from being turned into coal by the high amount of calcite surrounding the peat; the calcite caused it to be turned into stone instead.
For most organisms, the resting period is a stage of preparation during which the secretion of fluid from the moulting glands of the epidermal layer and the loosening of the underpart of the cuticle occurs. Once the old cuticle has separated from the epidermis, a digesting fluid is secreted into the space between them.
Ringer's solution is a solution of several salts dissolved in water for the purpose of creating an isotonic solution relative to the body fluids of an animal. Ringer's solution typically contains sodium chloride , potassium chloride , calcium chloride and sodium bicarbonate , with the last used to buffer the pH .
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 ...