Information om | Engelska ordet STROMATOLITES

Exempel på hur man kan använda STROMATOLITES i en mening

• The earliest known life, mostly represented by shallow-water microbial mats called stromatolites, started in the Archean and remained simple prokaryotes (archaea and bacteria) throughout the eon.
• This process generates the characteristic lamination of stromatolites, a feature that is hard to interpret, in terms of its temporal and environmental significance.
• A wide array of late Precambrian fossils have been recovered from the group, including stromatolites, vase-shaped microfossils, acritarchs and macro fossils such as Tawuia.
• The term in its broadest sense also includes the remains of other organic material produced by an organism; for example coprolites (fossilized droppings) or chemical markers (sedimentological structures produced by biological means; for example, the formation of stromatolites).
• The Pilbara contains some of the world's oldest surface rocks, including the ancient fossilised remains known as stromatolites and rocks such as granites that are more than three billion years old.
• A tiny copepod crustacean, Leptocaris stromatolicolus, is known only from the interstices of these stromatolites and bottom sediments in the saline pools.
• Fossilised stromatolites found nearby (one of the earliest forms of life on Earth) have been dated to the Paleoarchean era approximately 3.
• These mountains are an exposed portion of the Capitan Reef Barrier, a 350-mile long reef constructed primarily from calcareous sponges, encrusting algae, such as stromatolites, and lime-rich mud directly from the ocean.
• In other words, the word pristine is used when phosphatic sediment, phosphatized stromatolites and phosphate hardgrounds have not been disturbed.
• These red beds consist of basal fluvial-lacustrine conglomerates, sandstones, and shales overlain by cyclic dolomite-siltstone layers, stromatolites and red mudstones, which represent a playa lake, sabkha, and mudflat environments; purple shales and siltstones interpreted as subaerial mudflat deposits; and an upper unit of cross-stratified sandstone beds, which are interpreted to be aeolian in origin.
• Calcification may also refer to the processes of normal mineral deposition in biological systems, such as the formation of stromatolites or mollusc shells (see Biomineralization).
• There are many fossils to be found in this area from approximately 500 million years ago (in a time before dinosaurs) including coral, crinoids, trilobites, cephalopods, gastropods, pelecypods, stromatolites, and brachiopods.
• This gradual rotational deceleration is empirically documented by estimates of day lengths obtained from observations of tidal rhythmites and stromatolites; a compilation of these measurements found that the length of the day has increased steadily from about 21 hours at 600 Myr ago to the current 24-hour value.
• The Archean rocks from the Pilbara craton contain some of the first evidence of life, primitive cyanobacterial mats known as stromatolites.
• At the edge of Lake Clifton, rock-like structures called thrombolites (similar to stromatolites) can be seen, built by tiny micro-organisms believed to resemble the earliest forms of life on Earth.
• Hofmann's contributions have shed light on the biologic, stratigraphic, and evolutionary significance of various stromatolites, microfossils, macrofossils, and trace fossils.
• Collenia stromatolites were very common in the Paleoproterozoic era during the Siderian and Rhyacian periods, about 2.
• Winifred Goldring (February 1, 1888 – January 30, 1971) was an American paleontologist whose work included a description of stromatolites, as well as the study of Devonian crinoids.
• Stromatolites, bioherms (domes or columns similar internally to stromatolites) and biostromes (distinct sheets of sediment) are among such microbe-influenced build-ups.
• It contains the Donaldson Formation (a marine fan), Savage Dolomite which contains stromatolites; Bernafai Volcanics containing albite epidote actinolite chlorite; Corinna Dolomite, and Tunnelrace Volcanics.

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