Siluro-Devonian

Dostal, J., Wilson, R.A., Keppie, J.D. 1989. Geochemistry of Siluro-Devonian Tobique belt in northern and central New Brunswick (Canada).Tectonic Implications. Canadian Journal of Earth Sciences, 26, 1282-1296. 

Walker, J. A. McCutcheon, S.R., 1995. Siluro-Devonian stratigraphy of the Chaleurs Bay Synclinorium, northern New Brunswick. In Merlini, S.A.A. ed.. Current Research 1994. New Brunswick Department of Natural Resources, Minerals, Policy and Planning Division, Miscellaneous Report 18, 225-244. 

The Siluro-Devonian Tobique-Chaleurs Zone (TCZ) of New Brunswick is host to several relatively small Zn-Pb Cu-Ag sulfide deposits and occurrences that are all spatially associated with Early Devonian felsic volcanic and related sedimentary rocks (Fig. 1). The sulfide mineralization occurs as veins, veinlets and replacements of rock units that had high primary permeability (e.g., flow top breccias). Massive bedded sulfides that are typical of many modern and ancient VMS deposits are not present however, their absence is not surprising given the relatively shallow oxidizing marine conditions at that time therefore, the TCZ deposits belong to that part of the VMS family formed beneath the seafloor. This study was undertaken to assess the nature of the felsic volcanic host rocks and their control on mineralization. 

Dorobek S.L. (1987) Petrology, geochemistry and origin of burial diagenetic facies, Siluro-Devonian Helderberg Group (carbonate rocks), central Appalachians. AAPG Bull. 71, 492-514. 

Dorobek S.L. and Read J.F. (1986) Sedimentology and basin evolution of the Siluro-Devonian Helderberg Group, central Appalachians. J. Sediment. Petrol. 56, 601-613. 

Allen J. R. L. (1974) Geomorphology of Siluro-Devonian alluvial plains. Nature 249, 644-645. 

Zenger Dunham (1988) Siluro-Devonian units Silurian- Devonian New Mexico Yes 1 - 9/r... 

Zenger, D.H. Dunham, J.B. (1988) Dolomitization of Siluro-Devonian limestones in a deep core (5350 m), southeastern New Mexico. In Sedimentology and Geochemistry of Dolostones (Eds Shukla, V. Baker, P.A.). Spec. Publ. Soc. Econ. Paleont. Mineral., Tulsa, 43, 161-173. 

Drapeau, G. and Boucot, A.J. (1969) Siluro-Devonian rocks of Lake Memphremagog. Quebec Department of Natural Resources, Geological Exploration Service, Special Paper 1,44pp. 

Ordovician agnathans can informally be divided into naked, unarmoured forms (such as conodonts (Donoghue and Aldridge, this volume)), the micromeric thelodonts, and heavily armoured pteraspidomorphs, which include the arandaspids, astraspids and eriptychiids. The phylogenetic relationships of the Ordovician pteraspidomorphs with each other and later Siluro-Devonian forms, such as the heterostracans and cephalaspids, have yet to receive a detailed and comprehensive treatment in the light of new data. 

Dineley, D.E. and Loeffler, E.J. (1976) Ostracoderm faunas of the Delorme and associated Siluro-Devonian formations. North West Territories, Canada , Special Papers in Palaeontology, 18, 1-214. 

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