Specimen in Peter Redpath Museum.] _Pre-Palæozoic Rocks of Southern New Brunswick, as tabulated by Matthew:--"_ +--+--+------------------------------------------------------------+ | | | Thickness | | | | Feet. | | | | Coastal series (or system), 1872.-- | | | | Grits, hydromicaschists, agillities, etc. | | | | resembling the Pebidian rocks of Dr. H. | | | | Hicks 10,000 | | | | | | |E | Coldbrook Series (or System), 1865.-- | | |O | Diorites, felsites, petrosilex, etc.; | | |Z | resembling the Arvonian rocks of Dr. | | |O | Hicks. Thickness more than 15,000 | | |I | | | |C | Upper series (or system) of Laurentian, 1872. | |A | | Upper division.--Argillites, | |R | | limestones, graphitic shales. Fossils. In | |C | | upper part of the upper limestones of the | |H | | South basin, fragmental _Eozoon_, observed | |Æ | | by Sir J. W. Dawson in specimens sent him. In | |A | | middle of upper limestones in Middle basin, | |N | | spicules of sponges. In graphitic shale | | | | of South basin, spicules of _Halichondrites | | | | graphitiferus_. In lowest limestone of | | | | the Middle basin, the reef of columnar | | | | fossils described as Archæozoon 740 | | | | Middle division.--Quartzites, | | | | silicious schists, Fossils _Cyathospongia (?) | | | | eozoica_ near the top of this division 450 | | | | Lower division.--Limestones and | | |__| gneisses. No Fossils known 260[41]| | | | Lower series of Laurentian.-- | | | | Gneisses, Micaschists, etc ? | +--+--+------------------------------------------------------------+ [Footnote 41: The above thicknesses are on the authority of Dr. L. W. Bailey. _Report Progress Geological Survey Canada_, 1879, pp. 10, D. D., and 21, D. D. Dr. R. W. Ells in the same Report, p. 6, D., describes these rocks, sixty miles east of St. John, as one system, with a thickness of 14,000 feet.] [Illustration: Fig. 57A.--_Archæozoon Acadiense_, Matthew. _Horizontal and vertical sections of a group of specimens, reduced._ (From Photographs.)]