Transcribe
Translate
"The origin of the earth," geology schoolwork by Eve Drewelowe, March 1, 1922
Page 14
More information
digital collection
archival collection guide
transcription tips
-14- hotter than now and it gradually cooled and contracted until it became partly or entirely solid. The planetesimal advances the idea that the earth grew larger by gathering in material from the outside. The lithosphere was not necessarily hotter than now, if so hot. Under the first the air has become more thin and more poor from the heavy hot gaseous stage at first. The planetesimal hypothesis offers the idea that the atmosphere has grown larger and richer in material and was never hot. The lithosphere may or may not have had an atmosphere at first but if it had enough gravity at first to hold one it probably had one. As the earth grew its force of gravity increased, thus it was mroe able to hold gases. We know how gases diffuse and escape through space and even now it is hard for the earth to hold some of the very light gases. An atmosphere, therefore was supplied by the ever increasing force of gravity, generating heat in the impression of the earth, and the forcing of gases from the rocks. Then too, there was supposed to have been some gas in the original nebula which was gathered in. The gases probably were carbon dioxide, nitrogen and water vapor at first. The agents which decompose water vapor probably gave rise to water vapor. Condensation took place and then precipitation began. The ground water dissolved minerals out of rocks and deposited them in veins; and so the water level rose ponds, lakes and oceans appeared in the depressions of the surface. Vulcanism commenced. Life began, undoubtedly in the lowest forms at first which through evolution has passed from the very simple to the complicated forms. The phenomena of nature as we understand it begun its work and is yet continuing its processes. In the nebular hypothesis the oldest rock are igneous; "portions
Saving...
prev
next
-14- hotter than now and it gradually cooled and contracted until it became partly or entirely solid. The planetesimal advances the idea that the earth grew larger by gathering in material from the outside. The lithosphere was not necessarily hotter than now, if so hot. Under the first the air has become more thin and more poor from the heavy hot gaseous stage at first. The planetesimal hypothesis offers the idea that the atmosphere has grown larger and richer in material and was never hot. The lithosphere may or may not have had an atmosphere at first but if it had enough gravity at first to hold one it probably had one. As the earth grew its force of gravity increased, thus it was mroe able to hold gases. We know how gases diffuse and escape through space and even now it is hard for the earth to hold some of the very light gases. An atmosphere, therefore was supplied by the ever increasing force of gravity, generating heat in the impression of the earth, and the forcing of gases from the rocks. Then too, there was supposed to have been some gas in the original nebula which was gathered in. The gases probably were carbon dioxide, nitrogen and water vapor at first. The agents which decompose water vapor probably gave rise to water vapor. Condensation took place and then precipitation began. The ground water dissolved minerals out of rocks and deposited them in veins; and so the water level rose ponds, lakes and oceans appeared in the depressions of the surface. Vulcanism commenced. Life began, undoubtedly in the lowest forms at first which through evolution has passed from the very simple to the complicated forms. The phenomena of nature as we understand it begun its work and is yet continuing its processes. In the nebular hypothesis the oldest rock are igneous; "portions
Iowa Women’s Lives: Letters and Diaries
sidebar
