Location This site is the coast and hinterland of St. George's Bay, southwest Newfoundland, centered on Stephenville (43°, 33' N;58°, 35' W; Fig. 1). Drift is exposed in 42 mi (70 km) of nearlycontinuous coastal cliffs westward to Port au Port, and south to Highlands, with important patchy exposures and terrain units on Port au Port Peninsula and along hinterland routes. Access is byair to Stephenville (which has hotel accommodation), and thenby auto on paved roads, with short walks from the roads to thesections. Stops 1, 2, and 3 are reached from Newfoundland 460west of Stephenville. Stops 4,5, and 6 are reached via Newfoundland 460/461 to Trans-Canada Highway, then via Newfoundland 404 and 405 which branch from it. Consult locality maps fororientation from roads to sections at the stops. No prior permissionis required, merely explanation to local people encountered. Useful maps are a provincial road map, the Canada National Topographic System sheet 12B (scale 1:250,000), the 1:50,000sheets of the NTS 12B series, and GSC Map 15-73 (in Brookes, 1974).

Location The Annieopsquotch Complex is located in southwest Newfoundlandon crown land in the southwest corner of the Puddle Pond map area (NTS 12A/5 1:50,000). It is located immediatelyeast of the Burgeo Road (Newfoundland 480), approximately 30 mi (50 km) southeast of its intersection with Trans-Canada 1near Stephenville (Fig. 1). A short hike due east from point “A„on the road through open country, partly on a moose trailthrough tuckamoor, will bring you to the rising barren slopes of the ophiolite. The gabbro and sheeted dyke zones of the complex, as well as the Silurian sedimentary-volcanic sequence, can be seenon the traverse. The ground is sufficiently open, with abundantoutcrop on the ophiolite, that an exact route need not be specified. The line on Figure 2 indicates a good route, and one shouldfollow valleys and ridges. The use of air photos A19471-92 and A19470-188, 189 (available from the Newfoundland Departmentof Mines and Energy, Howley Building, St. John's, Newfoundland) in combination with a topographic map is stronglyrecommended as the country is rugged. Besides this route east of the road, the site includes outcropsalong the Burgeo Road over a distance of approximately 1.2 mi (2 km) (Fig. 2). Gabbro and sheeted dikes of the ophiolite locallycut by granodiorite dikes and elsewhere overlain by a coarsebasal conglomerate of the Silurian sedimentary sequence are exposedalong the route. A cross section through most of the Silurianred sedimentary and volcanic sequence can be examined bywalking along the road north from the quarry.

Abstract Thick, relatively complete successions of deformed Carboniferous strata are present in a narrow (16 mi maximum width) elongate zone trending from Cape Anguille on the Cabot Strait northeast to White Bay on the east side of the Great Northern Peninsula. Patches of thin, relatively undeformed Carboniferous strata are found west of this zone between Stephenville Crossing and Cape St. George, and east of this zone, bordering Red Indian Lake. Sedimentary facies within the zone indicate that the southeastern margin of the narrow zone was a major high- angle fault periodically active during Carboniferous time. The oldest post-Acadian strata in western Newfoundland (Anguille Group, Early Mississippian age) are thickest in the deformed zone. They are more deformed than younger strata there, and locally reach a slate grade of metamorphism. Strata of Late Mississippian age (Codroy Group and lower part of the Deer Lake Group) are present within and outside of the deformed zone. The Codroy Group is present only in southwestern Newfoundland and the Port au Port Peninsula, where it contains the only proved marine units in the Carboniferous of Newfoundland. The Deer Lake Group (Late Mississippian and Early Pennsylvanian) is present only in the northeastern part of the deformed zone, where it unconformably overlies the Anguille Group and adjacent pre-Carboniferous base-ment. The Upper Codroy, Deer Lake, and Barachois Groups show fanglomerate facies nearest to, and finer grained facies farthest from, the Long Range and Grand Lake faults that bound the deformed zone on the southeast.A period of deformation occurred during