Traditional Culture Encyclopedia - Hotel franchise - Please help me list the names of the eras starting from the Cambrian.
Please help me list the names of the eras starting from the Cambrian.
Geologic Time Scale A geological calendar consisting of named geological periods during which the rocks represented in the geological column were deposited. The need to divide the history of the Earth into easily arranged "chapters" was recognized early in the development of geology. The earliest attempt at such a division was made in 1756 by Johann Lehmann, who compiled a chronological table based on rock outcrops in central Europe. Lyman identified three types of mountains and three types of rocks that make up these three types of mountains. This pioneering work was followed by the eighteenth-century mineralogist Abraham Werner's fourfold division of rocks and ages. Werner believed that all rocks were precipitated from sea water and that they could be assigned to one of four stages. Although Werner's theory of rock formation is no longer valid, his idea of ??establishing individual units of time has survived. With the advancement of geological thought in the nineteenth century, geologists had an even greater need for a geological chronology. Their efforts resulted in the geological columnar sections and chronologies that are in common use today.
A major problem in designing a chronology is establishing criteria for dividing the major periods of Earth's history. These natural periods are based solely on geological events whose magnitudes are considered to be most easily identifiable in the rock record. Periods of mountain building activity and changes in the position of the oceans are therefore generally regarded as sufficiently important markers to demarcate the boundaries between ages and periods in the chronology. However, we now know that mountain building may be limited to a continent, and there is no exact pattern in the "advance and retreat" of the sea. Therefore, the basic principles of comparison and superposition of the sequence of fossil assemblages in rocks are the basis for establishing the standard rock columnar sections and geological timetables used today.
The time units in the geological chronology have the same names as the rock units originally used to distinguish the geological column sections. Thus, one can speak of the Cambrian period (for the geological timetable), and of the Cambrian rocks (for the geological column). The largest unit of time is a generation. Generations are divided into periods, and periods are divided into periods.
Unlike days and months on the standard calendar, units of geological time are artificially divided and span different lengths of time because there is no way to know what each era, era, or century contains. How long. Nonetheless, the geological timetable still gives earth scientists a sense of time. For example, if they say a rock is from the Cretaceous period, it means that it was formed during the Cretaceous period, about 65 million years ago.
Each of the five eras in the geological timetable has its own name that describes the degree of biological development that characterizes that era. For example, the literal meaning of the Paleozoic Era is "ancient creatures", which means that creatures in this era were relatively simple and it was an ancient stage of their development. The literal meanings of each generation and their names can be arranged from newest to oldest as follows:
Cenozoic Era - modern organisms
Mesozoic Era - intermediate organisms
Paleozoic Era - ancient organisms
Proterozoic Era - ancient organisms
Archaean Era - primitive organisms
Archaean and Proterozoic rocks are usually Rocks collectively called Precambrian. Precambrian rocks are mostly deformed and very old; therefore the record of this period in Earth's history is difficult to interpret. The Precambrian period represents the period of geological time from the beginning of Earth's history to the earliest fossil-bearing Cambrian rocks. Therefore, it represents approximately 85% of all geological time.
Most epochs within each epoch are named after the places where their rocks were first studied.
The Paleozoic Era is divided into seven eras (the oldest placed at the bottom of the table).
The origins of these periods and their names are listed below:
Permian - named after the Soviet Union's Perm province
Pennsylvanian ——Named after Pennsylvania, USA
Mississipian (Mississippian)——named after the upper reaches of the Mississippi Valley (the term Carboniferous used by European geologists includes the Pennsylvanian and Mississippian periods in North America) p>
Devonian - named after Devonshire, England
Geological Timeline
The order of units of geological time. The latest time unit is at the top of the histogram, while the oldest time unit is at the bottom of the graph.
Geology Geology is the science concerned with the origin, composition, structure, and history of the Earth and its inhabitants. The name originates from the Greek geo (earth) plus logos (discourse). The field of geology is very broad, which divides it into two major branches: physical geology and historical geology. Physical geology is the study of the Earth's composition, structure, various movements in and on the Earth's crust, and the changes that are now causing the Earth's surface
Silurian - named after the ancient tribe of Great Britain The Ordovician tribe
Ordovician - named after the ancient tribe of Great Britain, the Ordovician tribe
Cambrian - named after the Latin Cambria (Cambria), meaning Wales
The Mesozoic eras and the origins of their names are:
Cretaceous (Cretaceous) - from the Latin Creta, meaning chalk
Jurassic - named after the Jura Mountains between France and Switzerland
Mountains
Triassic - from The Latin word trias means
The names of the Cenozoic eras come from an outdated classification system that divided all the earth's rocks into four groups. The following two periods are the two surviving ones of this system still in use today:
Quaternary - meaning the fourth derivative
Tertiary - — meaning the third derivative
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