flagstone

silt

silt, predominantly quartz mineral particles that are between sand size and clay size, i.e., between 1-16 and 1-256 mm (1-406 –1-6502 in.) in diameter. Silt, like clay and sand, is a product of the weathering and decomposition of preexisting rock. Hardened silt forms a sedimentary rock called siltstone, which tends to deposit in thin layers sometimes referred to as flagstone because it is hard, durable, and flat, breaking into nearly rectangular slabs.

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flagstone

A naturally thin flat stone, normally used as a stepping stone or as outdoor paving; sometimes split from rock that cleaves easily.

See also: Stone

Illustrated Dictionary of Architecture Copyright © 2012, 2002, 1998 by The McGraw-Hill Companies, Inc. All rights reserved

flagstone

[′flag‚stōn]

(geology)

A hard, thin-bedded sandstone, firm shale, or other rock that splits easily along bedding planes or joints into flat slabs.

A piece of flagstone used for making pavement or covering the side of a house.

McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

flagstone, flag, flagging

flagstone: paved walk

A flat stone, usually 1 to 4 in. (2.5 to 10 cm) thick, used as a stepping-stone or for terrace or outdoor paving; usually either naturally thin or split from rock that cleaves readily; sometimes produced by sawing.

McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.

flagstone

, flag

a hard fine-textured rock, such as a sandstone or shale, that can be split up into slabs for paving

Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005