The word "chasma" refers to a steep-sided valley or gorge. Its spelling may seem a bit tricky, but it is pronounced as /ˈkæzmə/ (KAZ-muh) according to the International Phonetic Alphabet (IPA). The "ch" is actually a combination of the sounds /k/ and /h/ making the /k/ sound at the back of the throat followed by a pronounced exhalation of air for the /h/ sound. The "a" is pronounced as the short vowel /æ/, and the "s" and "m" are pronounced as expected.
Chasma is a noun that refers to a geological feature or landform on the surface of a celestial body, particularly on the Moon or Mars, characterized by a long, deep, and steep-sided valley or gorge. The term is derived from the Greek word "chasm," meaning a deep cleft or gap.
Chasmas typically form as a result of tectonic or volcanic activities, such as the stretching and pulling apart of the crust or the collapse of underground voids. They can also be created by the erosive forces of flowing water or lava. The steep sides of a chasma are often marked by cliffs or scarps, creating an imposing and rugged appearance.
On the Moon, chasmas are thought to have formed during a period of intense volcanic activity, where lava flows and subsequent cooling and contraction led to the formation of long fissures. These lunar chasmas are some of the largest known, often extending for hundreds of kilometers. On Mars, chasmas are believed to have formed due to various geological processes, including both volcanic and tectonic activity.
Chasmas provide scientists with valuable insights into the geological history and evolution of celestial bodies. The study of these features can help understand the mechanisms involved in their formation and the geological conditions that existed in the past. Additionally, chasmas are of significant scientific interest as potential sites for future exploration and scientific investigations.
Pandiculation, yawning.
A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.
The word "chasma" comes from Greek, specifically from the Greek word "χάσμα" (chasma), which means "gulf" or "chasm". The term was adopted into English in the mid-19th century to refer to a deep, steep-sided fissure or a wide empty space, particularly in geological contexts.