Question

Why do you think Sedimentary rocks are mostly found near the rivers? Give three reasons.

Answer 1

You probably recognize the Figure 4.19 as the White House, the official home and workplace of the President of the United States of America. Do you know why the White House is white? Its color has a lot to do with the stone materials that were used to construct it.

Construction for the White House began in 1792, and most of the work was carried out by people who had only recently come to the newly formed country of America. Its outside walls are made of a type of sedimentary rock called sandstone. The sandstone that was used to construct the White House is very porous, which means that rainwater can easily penetrate the sandstone. This made the White House susceptible to water damage in its early days of construction. To stop the water damage, workers had to cover the sandstone in a mixture of salt, rice, and glue, giving the White House its distinct white color

Answer 2

Answer:

Sedimentary rocks are the rocks formed due to the deposit of sediments, layer by layer, brought mainly by the agents of erosion like wind, water, gravity, etc.  

Explanation:

i) The sediments are often gathered from a weathering rock. Often the rivers, pick up these sediments leading to sedimentary rock formation.

ii) Often these sediments are often washed down to the nearest river, which is then carried by the river downstream.  

iii) These sediments then are deposited at suitable places resulting in the formation of sedimentary rocks, being found mostly near the rivers.