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 Most people first encounter the word "chalk" in school where it refers to blackboard chalk, which was originally made of mineral chalk, since it readily crumbles and leaves particles that stick loosely to rough surfaces, allowing it to make writing that can be readily erased.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
The Chalk Garden " 'The Chalk Garden' is extraordinarily modern for a high comedy set in the drawing room of a stuffy Sussex manor house: its plot and structure are elliptical; its witty lines aren't brittle but are instead redolent with what the author calls 'the shape and shadow of life.'... Bagnold's play is in part a journey to the bottom of Miss Madrigal's identity; it is also about the effect the woman has on her employer's household. Mrs. St. Maugham is a selfish, eccentric paragon of privilege who spends her days gardening but can't make anything grow." The Chalk Garden The Chalk