Answer:
Clay
Explanation:
Radon -
Radon is one of the radioactive noble gas , It is highly radioactive , hence , is dangerous for health . Radon is formed by the radioactive decay of the uranium into Lead .
The half life is equal to 3.8 days .
Radon is is very dense in nature .
Since , radon is a noble gas so , it does not react with the surroundings .
In the clay , the radon gets lost immediately from the source rock through the fractures .
Answer:
A geological event shifted the rocks
Explanation:
The rock layers have the natural tendency to layer up in horizontal manner, thus to be positioned one above the other. This actually means that the rock layers are sorted out by age, with the ones on the bottom being the oldest ones, and the ones on top the youngest ones. The Earth is not static though, and there's constant movements, geological activities, that disturb the rock layers. If there are geological activities that will push up and than move sideways the rock layers, the rock layers will appear to have vertical layers, not horizontal ones, thus giving a nice clue about how they came to be in that position.
Answer:
Volcanism: eruption of molten rock onto surface
tectonics: disruption of planet's surface by internal stresses
erosion: surface changes by water,wind or ice
Impact: impacts by asteroides or meteorites
Explanation:
Terrestrial planets have hard surfaces that can be reshaped by 4 major geological processes, that are:
- volcanism
- erosion
- tectonics
- impact cratering
Each of these processes is caused by different things. For e.g :
Volcanism happens when hot lava reaches the surface and give rise to volcanic planes e.g runny lava makes flat lava plains, while thickest lava makes steep stratovolcanoes
Erosion: is a geological process that removes rock, soil or dissolved materials and transport them by wind or water from one location of earth's crust to another. Example of erosion caused by ice, Glaciers carved by Yosemite Valley.
Tectonics: internal stresses in the earth caused by convection of mantle give rise to tectonic forces. Example compression forces give rise to mountain ranges. And valleys are formed at the point where a cryst is pulled apart
Impact cratering: This is caused when a meteorites or asteroides hits a planet's surface. Impact catering happened immediately after the solar system was formed.
Because the velocity of sediment settling (deposition) is positively related to grain size for waterborne sediments, fluvial deposits are more likely than glacial deposits to be well sorted.
The two important processes involved in lithification of sedimentary rocks are compaction and cementation.
Fresh sediment is usually loose material filled with open spaces or pores filled with air or water. Lithification serves to reduce this pore space and replace it with solid mineral material. The main processes involved in lithification are compaction and cementation.
Compaction compresses the sediment to a smaller volume by packing the sediment particles more tightly, removing water from the pore spaces, or by reducing the pressure at the sediment particle contact points. Cementation involves filling the pore spaces with solid minerals that are either deposited from solution or allow particles of existing sediment to grow into the pores.
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