Question

Distinct internal laminations that are inclined at an angle to the boundary of the main sedimentary layer are called ___________.

Answer 1

Final Answer:

Distinct internal laminations that are inclined at an angle to the boundary of the main sedimentary layer are called cross-beddings.

Step-by-step explanation:

The geological term for distinct internal laminations inclined at an angle to the boundary of the main sedimentary layer is "cross-beddings." Cross-beddings are a characteristic feature found in sedimentary rocks and are formed by the migration of bedforms like ripples or dunes.

These inclined laminations result from the deposition of sediment in a dynamic environment, such as a riverbed or a desert, where the direction and flow of the transporting agent cause the sediment to accumulate at an angle to the horizontal layer. The angle of inclination and the shape of cross-beddings can provide valuable information about the past sedimentary environments and the forces that shaped them.

Answer 2

Distinct internal laminations that are inclined at an angle to the boundary of the main sedimentary layer are called cross-beddings.

Step-by-step explanation:

Cross-beddings are geological structures characterized by distinct internal laminations that are inclined at an angle to the main sedimentary layer. These inclined layers are typically formed by the migration of bedforms, such as ripples or dunes, in a depositional environment. As sediment is transported by wind or water, it accumulates in inclined layers on the lee side of these bedforms.

Over time, these layers become preserved in the rock record, creating the characteristic cross-bedding pattern. Geologists use the study of cross-beddings to interpret the ancient depositional environments and understand the dynamics of sediment transport in the Earth's history.