Sedimentary Rock Questions |
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Why do you think some sandstones are harder than others?
What class of sedimentary rocks is made of fragments of rocks, minerals, and shells?
What is the name of sand grains cemented together?
Where is siltstone on Mohs hardness scale?
What are wavy features found on some sandstones?
What is the term for the layering of sedimentary rock?
How do bits of broken rock become sand?
What are the hollow ball-like objects, such as quartz, which are found in sedimentary rocks?
What is the strongest sedimentary rock, and which is the weakest?
What grains are in conglomerate rocks?
What kinds of rocks are similar to layers of cake?
How can I tell a rock is a cave rock?
Why do sandstone rocks sometimes have holes in them?
Why do you think some sandstones are harder than others?The minerals that are used to cement the sand grains together can vary. If quartz is used the rock will likely be harder than if calcite is used.Back to Top  |
What class of sedimentary rocks is made of fragments of rocks, minerals, and shells?Detrital sedimentary rocks. Examples of these types of rocks are shale, sandstone and breccia.Back to Top |
What is the name of sand grains cemented together?Sandstone is the rocks which consists of sand grains that are cemented together.Back to Top |
Where is siltstone on Mohs hardness scale?Siltstone is a rock. Mohs hardness scale measures the hardness of minerals. The hardness of the siltstone would be determined by the hardness of the individual minerals making up that siltstone.Back to Top |
What are wavy features found on some sandstones?Ripple marks. These are features that show that a sandstone was formed in an area with wave motion in the sea.Back to Top |
What is the term for the layering of sedimentary rock?Often these rocks are just called layered. Sometimes people use the term “banded” when referring to layered rocks with distinct color or mineral changes.Back to Top |
How do bits of broken rock become sand?Bits of broken rock can be weathered (changed) into sand by wind and water breaking down the rock bits.Back to Top |
What is the strongest sedimentary rock, and which is the weakest?The strength of a rock varies based on its formation. However, an example of a strong sedimentary rock would be sandstone and an example of a weak sedimentary rock would be loess.Back to Top |
What are the hollow ball-like objects, such as quartz, which are found in sedimentary rocks?By “hollow ball-like objects” I believe you are thinking of geodes. Geodes are round in shape and hollow in the center. Geodes are usually filled with crystals such as quartz and amethyst.Back to Top |
What grains are in conglomerate rocks?Conglomerate rocks are made up of many different types of grains from sand to various types of rocks.Back to Top |
What kinds of rocks are similar to layers of cake?Sedimentary rocks are often formed in layers. Metamorphic rocks can also be layered; however, it is usually because the original rock was layered.Back to Top |
How can I tell a rock is a cave rock?Unless the rock you have was found in a cave setting it may be no possible to conclusively say that it is a cave rock. Caves often form in limestone rocks because they can be dissolved by running water.Back to Top |
Why do sandstone rocks sometimes have holes in them?Sandstone rocks with holes are known as porous sandstones. The porosity is formed when spaces are left during the cementation process. The cementation process is when a liquid form of a mineral such as calcite or quartz “glues” the sand grains together. The holes that are left are great places for storing water or oil. Some sandstones have more holes than other depending on the amount of calcite or quartz that fills in between the sand grains.Back to Top |