{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,17]],"date-time":"2026-09-17T01:48:39Z","timestamp":1789609719130,"version":"build-2803163510"},"reference-count":22,"publisher":"American Association for the Advancement of Science (AAAS)","issue":"3756","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Science"],"published-print":{"date-parts":[[1966,12,23]]},"abstract":"<jats:p>\n            Because the Carboniferous deposits at Joggins, Nova Scotia, contain the earliest fauna of terrestrial vertebrates, the extremely well-preserved teeth of these ancient animals are of special interest. The \"mineral\" composition of teeth from the Joggins microsaur\n            <jats:italic>Hylerpeton dawsoni<\/jats:italic>\n            is crystallochemically identical with francolite, a carbonate fluorapatite. The fluorine content of the fossilized dentin is 3.1 percent, which is much higher than any previously recorded for fossil teeth.\n          <\/jats:p>","DOI":"10.1126\/science.154.3756.1548","type":"journal-article","created":{"date-parts":[[2006,10,5]],"date-time":"2006-10-05T10:47:55Z","timestamp":1160045275000},"page":"1548-1550","source":"Crossref","is-referenced-by-count":4,"title":["Fluorine Content of Microsaur Teeth from the Carboniferous Rocks of Joggins, Nova Scotia"],"prefix":"10.1126","volume":"154","author":[{"given":"John S.","family":"Stevenson","sequence":"first","affiliation":[{"name":"Department of Geological Sciences, McGill University, Montreal, Quebec"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Louise S.","family":"Stevenson","sequence":"additional","affiliation":[{"name":"Redpath Museum, McGill University"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"221","reference":[{"key":"e_1_2_1_1_1","first-page":"360","year":"1914","unstructured":"Bell, W. 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