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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 ...
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.
Deadliest wildfire in world history. Death toll can only be estimated because entire towns with all town records were incinerated. Burned over 1.2 million acres. Occurred on the same day as the Great Chicago Fire and the Great Michigan Fires. Peshtigo Fire: 1910 North Idaho and Western Montana: 87/?
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, 10] which contributed large amounts of oxygen to the atmosphere, as the new hordes of land plants pumped it out as a waste product.
New COVID-19 variants continue to pop up. Experts explain how many COVID variants there are, important subvariants, and the evolution of SARS-CoV-2 virus.
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]
For the Netherlands, based on overall excess mortality, an estimated 20,000 people died from COVID-19 in 2020, [10] while only the death of 11,525 identified COVID-19 cases was registered. [9] The official count of COVID-19 deaths as of December 2021 is slightly more than 5.4 million, according to World Health Organization's report in May 2022 ...