The correct spelling of the word is actually "cornerstone," and it is pronounced /ˈkɔːnərstəʊn/ in IPA phonetic transcription. This word is used to refer to a fundamental or essential part of something, like a cornerstone in a building's foundation. Many people misspell this word as "cornstone," likely due to the similar sound of the two syllables. However, it is important to use the correct spelling in order to maintain clear communication and avoid confusion.
Cornstone is a term used in geology to refer to a type of sedimentary rock that is composed primarily of cornets or concretions. These cornets are round or oval-shaped masses that are formed by the cementation of individual grains, often mineral grains or fossil fragments, within a sedimentary matrix. Cornstone rocks typically have a distinctive appearance due to the presence of these large cornets, which range in size from a few millimeters to several centimeters in diameter.
The cementation process that creates cornstone occurs when minerals in the surrounding sediment precipitate and bind the grains together, forming a hard and compact rock. This rock can vary in color and composition depending on the minerals present in the cementing material. Common minerals found in cornstone include quartz, calcite, and iron oxides, among others.
Cornstone is often found in association with other sedimentary rocks and can be found in various geological formations worldwide. It is commonly used as a building material due to its durability and weather resistance. In addition, cornstone can also preserve fossils and other geological features, making it a valuable resource for paleontologists and geologists studying the Earth's history.
Overall, cornstone is a sedimentary rock characterized by its large, rounded concretions and is formed through the cementation of individual grains. Its unique composition and appearance make it a significant geological material with various applications and scientific significance.
In geol., a term usually applied to the reddish and bluish-red limestone's occurring in the middle formation of the old red sandstone-so called from the fertile corn-soil overlying them.
Etymological and pronouncing dictionary of the English language. By Stormonth, James, Phelp, P. H. Published 1874.