marlstone

noun

noun

Etymology From marl + stone.

Geography, Geology, Natural sciences Marl when hardened into stone.

The steady climb eastwards has lifted us from the Soar Valley at Leicester into the marlstone (or ironstone) country of the Middle Lias which, at this point, forms a ridge of high ground over 700ft above sea level, […]1961 July, C. P. Walker, P. H. V. Banyard, “Leicester's Belgrave Road branch lives another year”, in Trains Illustrated, page 414:

Entry derived from the Wiktionary, under licence CC BY-SA 4.0 — list of authors.