proterozoic eon การใช้

• The Proterozoic Eon : synonymous with the genesis of life.
• The Hadean, Archean and Proterozoic eons were as a whole formerly called the Precambrian.
• It marks the end of the Proterozoic Eon, and the beginning of the Phanerozoic Eon.
• Eukaryotes first developed approximately 1.6 2.1 billion years ago ( during the Proterozoic eon ).
• The mountain is formed with quartzites and metamorphosed slates of the Proterozoic Eon and Cambrian Period.
• There is a fairly solid record of bacterial life throughout the remainder ( Proterozoic eon ) of the Precambrian.
• The Archean and Proterozoic eons follow; they produced the abiogenesis of life on Earth and then the evolution of early life.
• The earliest fossils possessing features typical of fungi date to the Proterozoic eon, some ( mutualistic relationships such as mycorrhiza and lichenization.
• The term " Precambrian " is recognized by the International Commission on Stratigraphy as a general term including the Archean and Proterozoic eons.
• These granite and rhyolite rocks of these mountains formed 1.485 billion years ago during the Proterozoic Eon when the area was volcanically active.
• It is the last era of the Precambrian Supereon and the Proterozoic Eon; it is subdivided into the Tonian, Cryogenian, and Ediacaran Periods.
• In contrast to Proterozoic Eon rocks, Archean Eon rocks are often heavily metamorphized deep-water sediments, such as graywackes, mudstones, volcanic sediments, and banded iron formations.
• Rocks from the earliest well established ice age, called the Huronian, formed around 2.4 to 2.1 billion years ) ago during the early Proterozoic Eon.
• Most of the rock in the Mission Mountains hails from the end of the Proterozoic Eon, towards the end of what is called Precambrian time.
• Laurentia is an ancient craton which forms the geologic core of North America; it formed between 1.5 and 1.0 billion years ago during the Proterozoic eon.
• It is at least certain that by the end of the Proterozoic eon, most of the continental mass lay united in a position around the south pole.
• The Purcells were formed in the Proterozoic eon ( in the Precambrian period ), which spans from 2, 500 million years ago to about 540 million years ago.
• The term " snowball Earth " was coined by Joseph Kirschvink in a short paper published in 1992 within a lengthy volume concerning the biology of the Proterozoic eon.
• The earliest fossils possessing features typical of fungi date to the Proterozoic eon, some ( Ma ); these multicellular benthic organisms had filamentous structures with septa, and were capable of anastomosis.
• Excluding a few contested reports of much older forms from North America and India, the first complex multicellular life forms seem to have appeared at roughly 600 Ma, in the Neoproterozoic era of the Proterozoic eon.