Answer:
All dinosaur fossils found by archeologists have been found a few centimeters below the iridium layer. So, the possibility of finding dinosaur fossils above the iridium layer is very slim.
Explanation:
Over 65 million years ago, dinosaurs roamed the earth but were canceled out as a result of an extraterrestrial impact on the earth's crust. Research proved that an asteroid brought the end of dinosaurs as the element iridium was found in the earth (since iridium is abundant in asteroids and not the earth's crust).
Records of fossils found have been between 13 to 60 centimeters below the iridium or the K-T boundary as it is called.
I believe the answer is a cutaway drawing/cutaway diagram
Some key concepts include:
Nationalism: It is a branch of human geography that deals with the relationship between political processes and spatial structures.
It usually has to do with countries
Territoriality: Division of the amount of land claimed by a certain person or group. It is the political division of the earth into separate countries or states.
hope this helps
(sorry went to eat dinner so took awhile...)
Answer:
Options (A), (C), (D) and (E)
Explanation:
The tectonic setting usually refers to the plate tectonic activity, where the earth's crust is divided into numerous small and large plates that move over the layer of the asthenosphere. This motion of plates gave rise to the formation of different geological settings on and under the earth's surface.
Some of the common tectonic activities that are associated with the volcanic activity are as follows-
- Continental rift refers to the splitting of the continental areas, where the rift valley is formed eventually and due to this divergent motion of the crust, there form volcanoes in the adjacent side of the plate boundary.
- Mantle plumes refer to the region where the hot and less dense magma rises up from the interior of the earth, forming large convection cells in columns. When plates move over this region, there form volcanoes. For example, Hawaii.
- Island arcs and continental arcs are commonly formed in the convergent plate boundaries, where the subduction zone is formed and as the magma rises upwards towards the surface in the over-riding plate, it forms volcanoes.
Thus, the correct answers are options (A), (C), (D) and (E).
<span>Ultramafic rocks contain "olivine," and are commonly found in "mantle."
mantle is a inner layer of a planet and makes up about 84% of the planet. Ultramafic rocks are found in layers, so naturally you will find this in the mantle layer of the planet.
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