caa a22 4500 386402140 CHVBK 20180307112203.0 cr unu---uuuuu 161130e198903 xx s 000 0 eng 10.1017/S0016756800006282 doi S0016756800006282 pii (NATIONALLICENCE)cambridge-10.1017/S0016756800006282 Discontinuities between picritic and crinanitic units in the Shiant Isles sill: evidence of multiple intrusion [Elektronische Daten] Two internal discontinuities are described from the Tertiary, Shiant Isles sill (northwest Scotland). The lower discontinuity separates picrite from overlying picrodolerite and the recently discovered upper discontinuity separates picrite from underlying crinanite. The sill is thus divided into an inner, strongly differentiated, picrodolerite-crinanite unit and outer picritic units. The lower discontinuity is slightly transgressive with respect to the picrite. The discontinuities are interpreted as the contacts between an earlier-intruded picritic sill (about 30 m thick) and a slightly later-intruded, much thicker, crinanitic sill. The Shiant Isles main sill is therefore a multiple intrusion. Copyright © Cambridge University Press 1989 Gibb F. G. F. Department of Geology, University of Sheffield, Sheffield SI 3JD, U.K.. Henderson C. M. B. Department of Geology, University of Manchester, Manchester M13 9PL, U.K.. Geological Magazine Cambridge University Press 126/2(1989-03), 127-137 0016-7568 126:2<127 1989 126 GEO https://doi.org/10.1017/S0016756800006282 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1017/S0016756800006282 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Gibb F. G. F. Department of Geology, University of Sheffield, Sheffield SI 3JD, U.K NATIONALLICENCE 700 1- Henderson C. M. B. Department of Geology, University of Manchester, Manchester M13 9PL, U.K NATIONALLICENCE 773 0- Geological Magazine Cambridge University Press 126/2(1989-03), 127-137 0016-7568 126:2<127 1989 126 GEO CC0 http://creativecommons.org/publicdomain/zero/1.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-cambridge