The most characteristic feature of sedimentary rocks is that they are
A)observed in great thicknesses.
B)formed in layered sequences-strata.
C)fossiliferous.
D)made from unconsolidated sediments.

Question

Quizplus · Accepted Answer

Sedimentary rocks are most often formed in layers, known as strata or beds, which can range in thickness from millimeters to meters. This layering is one of the defining features of sedimentary rocks.

Answer: C (with a possible exception for some sedimentary rocks)
 Fossils are commonly found in sedimentary rocks, although not all sedimentary rocks contain fossils. Some sedimentary rocks, such as those formed from chemical precipitation, may not contain any fossils. However, fossils are often used as key indicators for identifying and dating sedimentary rocks.

Answer: D (with a possible exception for some sedimentary rocks)
 Sedimentary rocks are typically formed from the accumulation of unconsolidated sediments, such as sand, silt, and clay, which have been transported and deposited by wind, water, or ice. However, some sedimentary rocks, such as limestone, can also form from the accumulation of biological debris or chemical precipitation. In these cases, the sedimentary rocks may not be unconsolidated.

The Most Characteristic Feature of Sedimentary Rocks Is That They