Pacific mountain system, series of mountain ranges that stretches along the Pacific Ocean coast of North America from northern British Columbia (Canada) to northwestern Mexico. They run for some 4,500 miles (7,250 km) in the United States and extend northward into Canada for another 1,000 miles (1,600 km).
Sinkholes are common where the rock below the land surface is limestone, carbonate rock, salt beds, or rocks that can naturally be dissolved by groundwater circulating through them. As the rock dissolves, spaces and caverns develop underground.
Sinkholes are formed when the land surface above collapses or sinks into the cavities or when surface material is carried downward into the voids. Drought, along with resulting high groundwater withdrawals, can make conditions favorable for sinkholes to form.
<span>There are 19 States that are completely north of 40 degrees north latitude or otherwise known as the 40th parallel. The states that are north of the 40th parallel are as follows from west to east; Washington, Oregon, Idaho, Montana, Wyoming, North Dakota, South Dakota, Nebraska, Minnesota, Iowa, Wisconsin, Michigan, New York, Connecticut, Rhode Island, Massachusetts, Vermont, New Hampshire and Maine.</span>
Answer :
(A). Charles Lyell correctly explained how fossils form and formulated some of the basic principles of relative dating
Explanation:
Charles Lyell was a Scottish geologist who demonstrated the power of known natural causes in explaining Earth's history.
Relative dating is the science of determining the relative order of past events, without actually deciding its absolute age.
Charles Lyell's principle of inclusions and components, explains that, with sedimentary rocks, if inclusions are found in a formation, then the inclusions must be older than the formation that contains them.
