Table of Contents
What are the 4 classes of sedimentary rocks?
Sedimentary rocks can be subdivided into four groups based on the processes responsible for their formation: clastic sedimentary rocks, biochemical (biogenic) sedimentary rocks, chemical sedimentary rocks, and a fourth category for “other” sedimentary rocks formed by impacts, volcanism, and other minor processes.
What do all sedimentary rocks have in common?
The most common set of sedimentary rocks consists of the granular materials that occur in sediment. Sediment mostly consists of surface minerals — quartz and clays — that are made by the physical breakdown and chemical alteration of rocks. These are carried away by water or the wind and laid down in a different place.
What are sedimentary rocks usually classified to?
Sedimentary rock is classified into two main categories: clastic and chemical . Clastic or detrital sedimentary rocks are made from pieces of bedrock, sediment, derived primarily by mechanical weathering. Clastic rocks may also include chemically weathered sediment.
What sedimentary rock can be formed two different ways?
1) Organic Sedimentary Rocks Formed from the remains of living things such as plants or animals. Limestone comes from tiny animals in the ocean. 2) Chemical Sedimentary Rocks Formed when minerals that were dissolved in water come out of solution. 3) Clastic Sedimentary Rocks Formed
How are three types of sedimentary rocks classified?
Sedimentary rocks are classified into three major groups: clastic, biologic and chemical. When sediments consolidate into a cohesive mass, they become sedimentary rock. The composition, texture (how the rock looks) and other features of a sedimentary rock can tell us a story about its origin.
What are the names of some sedimentary rocks?
There are three basic types of sedimentary rocks: Clastic sedimentary rocks such as breccia, conglomerate, sandstone, siltstone, and shale are formed from mechanical weathering debris. Chemical sedimentary rocks such as rock salt, iron ore, chert , flint, some dolomites , and some limestones, form when dissolved materials precipitate from solution.