chalk-stone
11Chalk Formation — The Chalk Formations of Europe are thick deposits of chalk, a soft porous white limestone, deposited in a marine environment during the upper Cretaceous Period. They appear most prominently in England. The formations are divided into three parts …
12Chalk Group — The Needles, part of the extensive Southern England Chalk Formation. The Chalk Group (often just called the Chalk) is a lithostratigraphic unit (a certain number of rock strata) in the northwestern part of Europe. It is characterised by thick… …
13chalk drawing — ▪ art in the visual arts, technique of drawing with chalk, a prepared natural stone or earth substance that is usually available in black (made either from soft black stone or from a composition including lampblack), white (made from various… …
14Chalk, Kent — Coordinates: 51°26′N 0°25′E / 51.43°N 0.41°E / 51.43; 0.41 …
15chalk — chalk1 [tʃo:k US tʃo:k] n [U] [: Old English; Origin: cealc, from Latin calx LIME12 , from Greek chalix small stone ] 1.) soft white or grey rock formed a long time ago from the shells of small sea animals = ↑limestone ▪ chalk cliffs 2.) …
16chalk — {{11}}chalk (n.) O.E. cealc chalk, lime, plaster, pebble, a West Germanic borrowing from L. calx (2) limestone, lime (crushed limestone), small stone, from Gk. khalix small pebble, which many trace to a PIE root for split, break up. In most… …
17chalk — I UK [tʃɔːk] / US [tʃɔk] noun Word forms chalk : singular chalk plural chalks a) [uncountable] a type of soft white stone b) [countable/uncountable] a stick of white or coloured chalk, used for writing or drawing, especially on a blackboard •… …
18chalk — chalk1 [ tʃɔk ] noun uncount a type of soft white stone a. count or uncount a stick of white or colored chalk, used for writing or drawing, especially on a chalkboard chalk chalk 2 [ tʃɔk ] verb transitive to write or draw something with chalk:… …
19Stone Age — the period in the history of humankind, preceding the Bronze Age and the Iron Age, and marked by the use of stone implements and weapons: subdivided into the Paleolithic, Mesolithic, and Neolithic periods. [1860 65] * * * First known period of… …
20stone — The common names are pōhaku (for various kinds, see pōhaku and entries that follow it); ili ili (pebbles); alā (dense basaltic); a ā, pāhoehoe (volcanic). Precious stone, pōhaku makamae. Soft porous stones used for polishing or scouring …
