California or Idaho, it depends on what states you are calling western states
Answer:
decade, century, period, era
Explanation:
Here is the explanation about these layers.
Limestone: This rock is formed from sediments that gather on the river floor over time & Limestone is mostly found in rivers, caves, etc. This resource is made from natural activity, for example, sediments travelling through the river & the water causing it to settle.
Banded-iron formations: This rock, or resource, is thought to be made in the seawater millions of years ago and is the result of oxygen production from a particular type of photosynthetic cyanobacteria. The oxygen, combined with dissolved iron makes this resource.
A metamorphic rock with fine grains: I cannot explain how this rock is made from, please find someone who can.
Red Beds: "Red beds may form during diagenesis. The key to this mechanism is the intrastriatal alteration of ferromagnesian silicates by oxygenated groundwaters during burial. " - Wikipedia
Chert Layers: Chert can form when microcrystals of silicon dioxide grow within soft sediments that will become limestone or chalk.
I hope this has helped you to learn about these rocks.
The Rate of movement of the Pacific Plate will be 37.87cm per year.
Underneath the Pacific Ocean is an oceanic tectonic plate known as the Pacific Plate. It is the largest tectonic plate at 103 million km2. The Farallon, Phoenix, and Izanagi Plate triple junction are where the plate initially formed 190 million years ago.
From the information given, the following can be deduced:
Distance = 500 km = 50000000cm
Time = 1.32 million years = 1320000 years.
Therefore, the rate of plate movement will be (i.e. speed) :
(speed) = Distance / Time
(speed) = 50000000 / 1320000.
(speed) = 37.87 cm/yr
To know more about Pacific Plate refer to: brainly.com/question/5794493
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