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Fire frequency - this refers to the number of times fire occurs in a given area under a defined geologic time. The concept of fire frequency is often applied to local fire events. [25] Fire intensity - also known as fire severity or magnitude is the degree of fire or the magnitude of fire event. Fire intensity is categorized into low fire ...
A group of researchers were able to use a 350-year tree-ring fire record to reconstruct the fire history in precise detail. This is a shining example of how the method can be used in a place with a lost or no written history of a fire regime.
The fossil record of fire first appears with the establishment of a land-based flora in the Middle Ordovician period, 9] permitting the accumulation of oxygen in the atmosphere as never before, as the new hordes of land plants pumped it out as a waste product.
Fire was an important factor in expanding and developing societies of early hominids. One impact fire might have had was social stratification. The power to make and wield fire may have conferred prestige and social position. [35] Fire also led to a lengthening of daytime activities, and allowed more nighttime activities. [45]
Index fossils must have a short vertical range, wide geographic distribution and rapid evolutionary trends. Another term, "zone fossil", is used when the fossil has all the characters stated above except wide geographical distribution; thus, they correlate the surrounding rock to a biozone rather than a specific time period.
Low-end estimate of burned acreage based on Inciweb since May in Colorado. The state's worst fire season on record. The season of the Hayman Fire saw 360,000 acres burn - which was the previous record holder. 2020: 119,987 acres (48,557 ha) Bighorn Fire: Arizona: Started June south of Phoenix. 2020: 193,455 acres (78,288 ha) Bush Fire: Arizona
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The Cambrian explosion (also known as Cambrian radiation [1] or Cambrian diversification) is an interval of time beginning approximately in the Cambrian period of the early Paleozoic, when a sudden radiation of complex life occurred and practically all major animal phyla started appearing in the fossil record.