Can fissure lines provide pathways for the migration of magma beneath the Earth's surface?

Find out what's coming up on air, Listing of previous NOVA Web sites, NOVA's ... Fissure Diagram of a volcano. Fissure On volcanoes, a fissure is an ... Apr 7, 2025 ... What is an anal fissure? A painful tear in the lining of the anal canal. Ada Health provides insights on causes, symptoms, and treatments ... A fissure vent, also known as a volcanic fissure, eruption fissure or simply a fissure, is a linear volcanic vent through which lava erupts, usually without ... Over time, cavities can develop. In fact, over 75% of tooth decay begins in these fissures. While fluoride helps prevent decay, dental sealants provide extra ... Sep 25, 2023 ... What Are Anal Fissures? An anal fissure is a cut or a tear in the thin, delicate lining of your anus. The tear often exposes the muscle around ... Sep 26, 2022 ... To conclude, anal furunculosis is a topic not for the faint hearted. This progressive inflammatory disease can carry with it many challenges but ... What is the main cause of anal fissure? It's often thought to be caused by hard or painful bowel movements. These can cause the muscles around your anus to ... Apr 20, 2022 ... Dental fissure sealants are a non-invasive way of providing a protective layer over the deep groves in teeth, to help reduce the risk of decay. Sep 30, 2021 ... What is an anal fissure? Treatment; Symptoms; Causes; How to heal; Images; Fiber and home remedies; Pain management; Prevention; Takeaway. An anal fissure is a small, painful tear in the lining of the anus. Anal fissures may hurt and bleed during or after a bowel movement, but about 90% heal ...