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coursed rubble[¦kȯrsd ′rəb·əl]
Masonry in which rough stones are fitted into approximately level courses.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
Masonry construction in which roughly dressed stones of random size are used, as they occur, to build up courses; the interstices between them are filled with smaller pieces, or with mortar.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.