Chalk It is formed in the sea by sub-microscopic plankton, which fall to the sea floor and are then consolidated and compressed during diagenesis into chalk rock. Most people first encounter the word "chalk" in school where it refers to blackboard chalk, which was originally made of mineral chalk, since it readily crumbles and leaves particles that stick loosely to rough surfaces, allowing it to make writing that can be readily erased. Blackboard chalk manufacture now may utilize mineral chalk, other mineral sources of calcium carbonate, or the mineral gypsum (calcium sulfate). While gypsum-based blackboard chalk is the lowest cost to
Pointed Sticks stick" might be more useful than defending against fresh fruit. They chose this name after discovering that their first six choices had all been taken. At the beginning of their career they were briefly known as "Ernie Dick and the Pointed Sticks". Pointed Sticks Pointed Sticks are a Canadian punk rock/new wave band from Vancouver. Originally active from 1978 to 1981, then reuniting to perform in July 2006 through to November 2012. After a three-year hiatus, Pointed Sticks returned to the stage in June 2015 for shows on Vancouver island as well as the July 11th Khatsahlano street party in