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Re-mapping of the Quaco Head area of southern New Brunswick has shown that Windsor Group Limestones have a more extensive distribution than was previously recognized. The limestone at Quaco Head is up to 8.5 m thick and rests unconformably on basalts Precambrian (Coldbrook) age. The limestone, which now consists mainly of microsparite, shows prominent algal lamination including laterally-linked hemispheroids and large, isolated 'heads', up to 80 cm high. Stratified and laminated limestone with a pseudo-oolitic texture occupies the troughs between the 'heads'. The limestone is capped by 2 m of calcibreccia, overlain by red, matrix supported polymict conglomerates, laminated sandy siltstones and coarse, clast-supported polymict conglomerates. The limestone lithofacies form a regressive sequence, deposited in shallow subtidal and intertidal environments, close to the shore of the Windsor sea. The overlying clastic sediments probably record the onset of vigorous siliclastic alluvial fan sedimentation in response to local fault movement in ?Late Visean (Hopewell Group) times.   RESUME  De nouveaux releves cartographiques dans la region de Quaco Head au sud du Nouveau-Brunswick demontrent que l'etendue des calcaires du groupe Windsor est plus importante qu'on ne le croyait. Le calcaire a Quaco Head a une epaisseur de 8.5 m et repose en discordance sur des basaltes pre-cambrlens (Coldbrook). Le calcaire, qui consiste surtout de microsparite, presente des feuillets d'algues sailIants comprenant des formes hemispheriques liees. lateralement et du grandes “tetes” isolees mesurant jusqu'a 80 cm de hauteur. Un calcaire stratifie et lamelleux a texture pseudo-oolithique occupe les depressions entre les "tetes". Le calcaire est coiffe d'une breche calcaire de 2 a d'epaisseur et recouvert de conglomerats polygeniques rouges a matrice portante, de siltstones sableux lamelieux et de grossiers conglomerats polygeniques se soutenant. Le lithofacies calcaire constitue une sequence en regressivite deposee pres du rivage de la mer Windsor, sur l'estran et en milieu peu profond. Les sediments clastiques qui recouvrent le calcaire retire sen tent probablement le debut d'une vigoureuse sedimentation siliclastlque provenant d'un cone de dejection, le resultat de mouvements de failles locales datant de (?) la fin du Viseen (groupe Hopewell).   [Tradult par le Journal]

The distribution, biota and stratigraphy of a Windsor Group limestone (Mississippian) and associated sediments in the Quaco Head area of New Brunswick