The Continental Margin Around Newfoundland

A volcanic province near the western termination of the Charlie-Gibbs Fracture Zone at the rifted margin, offshore northeast Newfoundland

“…A hinge zone (“H” in Figure ) defines the locus of this change. Our data and earlier work show that the shelf here is underlain by Carboniferous St. Anthony Basin (“C” in Figure ) and pre‐Carboniferous Appalachian terranes [ Cutt and Laving , ; Grant and McAlpine , ]. Subsided blocks of prerift continental basement (B) extend beyond the hinge zone (H) and are locally downfaulted, “F,” on line 2.…”

“…Sills within the northern part of Orphan Basin are located within early Cretaceous sediments [ Enachescu et al, ]. In our study region, the sills sit near the top of continental basement on line 2, and there were probably no significant accumulations of Early Cretaceous sediments for them to intrude [ Cutt and Laving , ; Grant and McAlpine, ]. In addition, the sills do not appear to extend up into the Latest Cretaceous sediments.…”

“…However, the transition zone, if present, is not well‐defined north of the Flemish Cap [ Chian et al , ; Welford et al , ]. Magmatic activity appears to have been minimal within Orphan Basin, although some studies suggest the presence of Cretaceous igneous features along the outer edge of Orphan Knoll and in West Orphan Basin [ Grant and McAlpine , ; Enachescu et al , ; Whittaker et al , ; Pe‐Piper et al, ]. However, the region does not display thick sequences of igneous crust or underplated material.…”

Structure and rifting evolution of the northern Newfoundland Basin from Erable multichannel seismic reflection profiles across the southeastern margin of Flemish Cap

“…Inner Galicia, Lusitanian; Murillas et al 1990) while the Flemish Cap was not affected until the early Jurassic (Sibuet et al 2007b). From Late Jurassic to Early Cretaceous another phase of rifting progressed diachronously from south to north, leading to the east–west separation of the Grand Banks from central Iberia and then to the northwest–southeast separation of the southeastern margin of Flemish Cap from Galicia Bank (Williams 1984; Tucholke et al 1989; Grant & McAlpine 1990). A final phase of separation of Flemish Cap from Galicia Bank occurred in the Late Cretaceous (de Graciansky & Poag 1985; Tucholke et al 1989; Hopper et al 2006; Tucholke & Sibuet 2007), separating the northeast margin of Flemish Cap from the Goban Spur, offshore Ireland.…”

New evidence of shared dinosaur across Upper Jurassic Proto-North Atlantic: Stegosaurus from Portugal

“…In the external basins of the Iberian margin (e.g., the Peniche and Porto Basins), the J3 megasequence (from Alves et al 2006) that ended at the Berriasian (above Lourinhã Group) is composed of sands, red marls, and carbonates deposited in shallowmarine to fluvial-deltaic environments. The same interbedded sandstones and shales sequences deposited in alluvial plain environments that span from the Late Jurassic until the Early Cretaceous (below the Avalon unconformity) are also described for the Grand Banks region (Grant and McAlpine 1990;Wade and MacLean 1990;Enachescu 1992). This regressive tendency favors the enlargement of the emerged areas and the reduction of marine barriers between both Atlantic marginal continental landmasses (Iberia and Newfoundland ;Ziegler 1990;Dercourt et al 1993Dercourt et al , 2000.…”