Large ocean basins are the only places where pelagic sediments are found. The main types of deposits are globigerina ooze and red clay.
<h3>What common dominant sediment type in Pacific Ocean? </h3>
Diatom oozes are only found in a ring that spans the North Pacific Ocean and an almost continuous belt that surrounds Antarctica.
Nutritional requirements of diatoms and are more common in the warmer seas towards the equator.
As a result, siliceous radiolarian ooze predominates in the equatorial coastal Pacific, while siliceous diatom ooze predominates in the polar regions.
Therefore, The dominant sediment type found along the equatorial Pacific Ocean is biogenous
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Answer:
El río Nilo marcó el nacimiento geográfico de la cultura egipcia y nació en el área de los grandes lagos, siendo el lago y un punto de referencia para terminar formando un delta debido a la acumulación de sedimentos, en el mar Mediterráneo.
Explanation:
Answer:
The age of the rock = 2800.6 million years = 2.8 billion years.
A simple method of analysis similar to Carbon dating is used to obtain the required age of the rock. Radioactive substances decay according to first order reaction kinetics. So, plugging all the required parameters into the general equation for amount of substance left in a first order decay gives us the age of the rock.
Explanation:
Half life of Uranium-235 = 700 million years (from literature)
The decay of radioactive substances follow first order reaction kinetics.
The general equation is given as
A(t) = A₀ e⁻ᵏᵗ
A(t) = Amount of radioactive substance left after a particular time = 6.25%
A₀ = initial amount of radioactive substance = 100%
t = time that has passed since the beginning = age of the rock = ?
k = decay constant
The decay constant is related to the half life (T) through the relation,
k = (In 2)/T
k = (0.693/700) = 0.00099 /million years
A(t) = A₀ e⁻ᵏᵗ
6.25 = 100 e⁻ᵏᵗ
0.0625 = e⁻ᵏᵗ
In e⁻ᵏᵗ = In 0.0625 = -2.7726
-kt = - 2.7726
t = (2.7726/0.00099) = 2800.6 million years
t = 2.8 billion years.
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