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Plume tectonics is a geoscientific theory that finds its roots in the mantle doming concept which was especially popular during the 1930s and initially did not accept major plate movements and continental drifting. It has survived from the 1970s until today in various forms and presentations.
Serpula (also known as calcareous tubeworm, serpulid tubeworm, fanworm, or plume worm) is a genus of sessile, marine annelid tube worms that belongs to the family Serpulidae. [3] Serpulid worms are very similar to tube worms of the closely related sabellid family, except that the former possess a cartilaginous operculum that occludes the ...
In addition, the structure of an organism can be preserved as a fossil and we know that some fossils on Earth are as old as 3.5 billion years. [13] [14] These byproducts can make excellent biosignatures since they provide direct evidence for life. However, in order to be a viable biosignature, a byproduct must subsequently remain intact so that ...
Fossils are direct evidence of life. In the search for the earliest life, fossils are often supplemented by geochemical evidence. The fossil record does not extend as far back as the geochemical record due to metamorphic processes that erase fossils from geologic units.
Pictured is a lump of 66-million-year-old vomit found on the Cliffs of Stevns, a geological site on the Danish island of Zealand that is comprised of a 15 km-long fossil-rich coastal cliff.
The Bonnet Plume Formation is a Mesozoic geologic formation in Canada's Yukon territory. [1] The thickness of the formation is known to be at least 1500 metres. [ 1 ] The formation is composed of sedimentary rocks including conglomerate , sandstone , siltstone , mudstone and coal .
Serpula vermicularis, known by common names including the calcareous tubeworm, fan worm, plume worm or red tube worm, is a species of segmented marine polychaete worm in the family Serpulidae. It is the type species of the genus Serpula and was first described by Carl Linnaeus in his 1767 12th edition of Systema Naturae .
African plumes, the heatwave phenomenon that could sizzle the UK, can make temperatures soar this June and July