{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,1,28]],"date-time":"2026-01-28T10:33:34Z","timestamp":1769596414860,"version":"3.49.0"},"reference-count":13,"publisher":"Geological Society of London","issue":"4","license":[{"start":{"date-parts":[[1979,11,1]],"date-time":"1979-11-01T00:00:00Z","timestamp":310262400000},"content-version":"stm-asf","delay-in-days":0,"URL":"https:\/\/doi.org\/10.15223\/policy-002"}],"content-domain":{"domain":["www.lyellcollection.org"],"crossmark-restriction":true},"short-container-title":["SJG"],"published-print":{"date-parts":[[1979,11]]},"abstract":"<jats:title>Synopsis<\/jats:title>\n          <jats:p>K-Ar isotopic age determinations on the Tertiary composite sill indicate it is at least 56.3 \u00b1 1.0 Ma old. The olivine dolerite sheet is likewise of a Tertiary age, with a similar age to the composite sill, and may be related to the crinanite sills of southern Arran. The whole almost certainly belong to the \u2018Major Phase\u2019 of igneous activity identified as occurring at 59 Ma in the British Tertiary igneous province.<\/jats:p>","DOI":"10.1144\/sjg15040257","type":"journal-article","created":{"date-parts":[[2010,1,15]],"date-time":"2010-01-15T00:29:39Z","timestamp":1263515379000},"page":"257-262","update-policy":"https:\/\/doi.org\/10.1144\/crossmark-policy","source":"Crossref","is-referenced-by-count":4,"title":["Isotopic age determinations on the composite sill and associated olivine dolerite, South Bute"],"prefix":"10.1144","volume":"15","author":[{"given":"D. S.","family":"Buist","sequence":"first","affiliation":[{"name":"Department of Transport, Midland Road Construction Unit, P. O. Box No. 6, County Offices, Matlock, Derbyshire DE4 3AG"}]},{"given":"P. R.","family":"Ineson","sequence":"additional","affiliation":[{"name":"Department of Geology, University of Sheffield, Mappin Street, Sheffield S1 3JD"}]},{"given":"J. G.","family":"Mitchell","sequence":"additional","affiliation":[{"name":"School of Physics, The University, Newcastle-upon-Tyne NE1 7RU"}]}],"member":"1881","published-online":{"date-parts":[[2022,6,7]]},"reference":[{"key":"e_1_2_1_2_1","doi-asserted-by":"publisher","DOI":"10.1144\/transglas.18.3.388"},{"key":"e_1_2_1_3_1","doi-asserted-by":"publisher","DOI":"10.1144\/transed.15.1.52"},{"key":"e_1_2_1_4_1","unstructured":"BUIST D. S. 1953. The geology of South Bute. Univ. Durham M.Sc. thesis (unpubl.)."},{"key":"e_1_2_1_5_1","article-title":"The Phanerozoic Time Scale","volume":"1","author":"HARLAND W. B.","year":"1964","unstructured":"HARLAND W. B., SMITH A. G., WILCOCK B. 1964. The Phanerozoic Time Scale. Spec. Publ. Geol. Soc. Lond. 1 (Suppl. 1971, 5).","journal-title":"Spec. Publ. Geol. Soc. Lond"},{"key":"e_1_2_1_6_1","first-page":"98","article-title":"Notes on the geological structure of South Bute","volume":"20","author":"McCALLIEN W. 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