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impact theory
mass extinctions of animals and plants
There is growing evidence and belief among Earth scientists that there was indeed a giant impact with a large body somewhere between the size(s) of Planet Mercury and Planet Mars which struck the Earth some 4.5 billion years ago. This is commonly referred to as the "Giant Impact Hypothesis". Strong support for this theory comes from many angles. One of which is the fact that Moon rock and Earth rock is derived from the same compounds. The commonly accepted name for the Planetary body believed to have struck and molded with Earth is "Theia". This designation was first proposed by the English geochemist Alex N. Halliday in 2000 and has since become accepted in the scientific community. According to modern theories of planet formation, Theia was part of a population of Mars-sized bodies that existed in the Solar System 4.5 billion years ago. Indeed, one of the attractive features of the giant impact hypothesis is that the formation of the Moon fits into the context of the formation of the Earth itself: during the course of its formation, the Earth is thought to have experienced dozens of collisions with such planet-sized bodies. The Moon-forming collision was only one such "giant impact" and perhaps the last. Because of gravity, the surface of the moon and Earth have smoothed over millions of years. Theia was engulfed by the Earth, in theory, making Earth much larger than it was prior to the impact, even though large chunks fell off which ultimately formed the moon.
There are four main hypothesis for the formation of the moon. ; Fission hypothesis - The Moon broke off from the Earth ; Capture hypothesis - The Moon was captured ; Co-formation hypothesis - The Moon and Earth were created at the same time ; Giant Impact hypothesis - The Moon was created when a Mars sized object (Theia) crashed into the Earth.
The theory was that a large object- about the size of Mars -struck earth. Material from the object and Earth's outer layers was thrown into orbit around Earth. Eventually, this material combined to form the moon.
The use of drilling fluids as follows:Remove cuttings from wellSuspend and release cuttingsControl formation pressuresSeal permeable formationsMaintain wellbore stabilityMinimize formation damageCool, lubricate, and support the bit and drilling assemblyTransmit hydraulic energy to tools and bitEnsure adequate formation evaluationControl corrosionFacilitate cementing and completionMinimize impact on environment
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The Battle of Tours on October 10, 732, 760 odd years before the colonisation of America had no impact what so ever on the formation of it.
The main functions of drilling fluids can be summarized as follows:Remove cuttings from wellSuspend and release cuttingsControl formation pressuresSeal permeable formationsMaintain wellbore stabilityMinimize formation damageCool, lubricate, and support the bit and drilling assemblyTransmit hydraulic energy to tools and bitEnsure adequate formation evaluationControl corrosionFacilitate cementing and completionMinimize impact on environment
impact theory
It does impact the ozone depletion. They act as a base for the depletion of ozone.
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craters
the impact theory.
A crater is the bowl shaped formation at the top of a volcano or meteor impact site.
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