This question is incomplete because the options are not given; here is the complete question:
Which phrase describes a sill?
A. Fills in valleys and rivers
B. Is a hardened magma intrusion
C. Cuts vertically through older rock layers
D. Is built up by numerous eruptions over thousands of years
The correct answer is B. Is a hardened magma intrusion
Explanation:
Sills are horizontal layers in the soil that form as a result of magma. Also, sills are considered sheet intrusion because the hardened magma gets into older rock layers or soil layers and cuts the rocks horizontally. Moreover, the type of intrusion is studied by geologists to understand the formation and age of soil layers and this differs from other intrusions due to its composition and horizontal formation. According to this, the correct answer is B.
Answer:
Growing crops for feed requires a large number of workers
Explanation:
The dairy farming has been modernized and in it lot of mechanization has been included. While this makes the dairy farming much easier, there are still things in it that require lot of labor force, still making it a labor intensive farming type. In order to feed the cattle, lot of food is required, and for large areas are planted with several types of crops. Those crops need work, be it for their growth, harvesting, sorting out, or feeding the cattle, thus lot of laborers are required for that to be achieved.
Answer:
The intermediate magma has a heterogeneous structure, since it has a part of Silice, approximately 50-60% to be more exact.
When it turns into lava, it produces rocks like the Andesite and, in the opposite case of its crystallization, it forms rocks like the Diorite.
A comparison of felsic magma is much more viscous.
It is important to clarify that this magma is a type of primary magma, that is to say that they are magmas formed from the fusion of the rocks of the mantle or the crust.
Explanation:
The fusion of these rocks are what would give rise to the intermediate magma, this intermediate magma is a primary magma, like the mafic and felsic.
The primary magmas unlike the derived magmas is the origin or the reason for how they are formed, which is what we write above, derived magmas usually form differently since they are the product of the evolution or changes that magmas undergo primary
Externally, the forces that shape the earth’s surface are weathering and deposition. These are mainly powered by the sun. These forces are responsible for features such as ox-bow lakes and deltas. Internal processes include the convection currents of the mantle – that result in tectonic plate movements- and volcanic eruptions that are responsible for features such as mountains.
The Hudson River is the river in new york state flows for several miles over surface bedrock that is more than 542 million years old. It was named after Henry Hudson who is an Englishman cruising and have explored it in 1609.
