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Journal of Paleontology

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¹ School of Geography, Earth & Environmental Science, University of Birmingham, Edgbaston, Birmingham B15 2TT, UNITED KINGDOM

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Early Silurian trilobites of Anticosti Island, Québec, Canada. B. D. E. Chatterton and R. Ludvigsen. 2004. Palaeontographica Canadiana No. 22. 264 p., including 85 pls. (p. 91–261). ISBN: 0-919216-93-5.

With an area of some 8,000 km², Anticosti Island is one of the largest islands in maritime Canada, second only to Newfoundland. The solid geology comprises two Ordovician formations and five Silurian ones, which are superbly exposed in coastal and river sections. Fossils are abundant throughout the sequence, and are often splendidly preserved. Previous studies have shown that the strata were deposited mainly below fair-weather wave base. The total depth range of the depositional environments represented is estimated at <10–120 m, but 20–70 m (Benthic Assemblage 2 – BA 4/5) is more common. Deposition occurred on a broad, south-facing carbonate ramp, 10°–17° south of the equator. In this setting, the ramp would have been swept by west-directed tropical cyclones traveling off the Iapetus Ocean in the summertime. This explains the abundance of tempestites in the . . . [Full Text of this Article]