... by the Quaternary Lion fault set (Sisar, Big Canyon, and Lion faults), which dips south and merges into the Sisar decollement within the south-dipping, ductile, lower Miocene Rincon formation. Folds with north-dipping axial planes, including the Lion Mountain anticline and Reeves syncline, are middle Pleistocene...

... Tertiary rocks exposed are the reddish sandstones of the middle Miocene Topanga formation present in a narrow fault zone in the Pacoima Hills. Some 1,700 feet of marine upper Miocene Modelo clastic sediments crop out extensively as far east as the mouth of Big Tujunga Canyon. Topanga or early Modelo basalt...

... the base of the mountains west of a high-angle range-front fault are separated into two structural plates by the Big Hill fault ( Fig. 3 ). This low-angle fault is continuously exposed for a distance of several kilometers, and remnants of its upper plate overlie the eastern limb of a major syncline, here...

... Creek Canyon: also a syncline in the Wayan beds. In the vicinity of the Snake River boundary fault, travertine, hot sulphur water, and fault gouge were encountered. After lunch, the caravan entered the Big Hole Mountains of the Snake River Range, and the Snake River basalts. Leaving the basalts...

... underlies the area stratigraphically above the DE tongue of the Big Skunk Formation. As Figure 4 shows, this area lies on the northwest plunge of the structural high flanked by the Swallow Canyon and Dry Creek synclines. Throughout most of this area, outcrops are poor, consisting only of thin ledges...

... NW. of Fort Collins. Fig. 3a. Lower Canyon of Big Thompson River. Walls of dark canyon show distinct beds, striking N. 60°–70° W., of quartzite and sills of Mount Olympus granite porphyry (O) dipping SW. about 80°. View is east to foothills. Fig. 3b. Quartzite interbedded with phyllite, Big...

... the steep slope north of Big Caliente Debris Dam shows a 4-foot stratum of coarse sandstone 20 feet below the contact with the Juncal formation. Thickness. —In its exposures along Blue Canyon the limestone varies from 20 to 50 feet in thickness. In the syncline that crosses Mono Creek the thickness...

... regions where events with M w > 7 have been postulated on the basis of paleoseismic excavations. Figure 2. Tectonic map of study area. Merrick syncline (MS) domain: Kagel Ridge, Little Tujunga Canyon, and Marek Canyon sites; Soledad Canyon (SC) block; Magic Mountain (MM) area: Transmission Line...

... Simon syncline, and Halfway syncline. Structural features were controlling factors in Permian deposition and the stratigraphic phenomena of the Permian basin are related directly to lateral gradation. Surface studies and subsurface work reveal that, as a result of this gradation, many of the various...

... Formation; Tsh/Tsc1/Tsc2/Tss= Soda Lake Shale Member of the Vaqueros Formation; Tsi = Simmler Formation; Tsm = Santa Margarita Formation; WRT = Wheeler Ridge thrust. Stop 2 (34.864257°N, 119.248282°W) is at Apache Saddle, which is located at the head of Santiago Canyon and within the western big bend...

... on both sides of the A venal syncline. The upper Miocene deposits on the north flank of the Pyramid Hills anticline toward the northwest are cut off at the Waltham Canyon fault and strike into the Franciscan rocks of the Parkfield block; the Miocene deposits in the Avenal syncline are likewise cut off...

... Eocene resembles that of the central part of California and differs from that in most areas farther south. In the vicinity of Big Tar Canyon and the southeast end of Reef Ridge, the basal member of the Eocene, the Avenal sandstone, lies with an angular discordance of about 30 degrees upon pre-Moreno...

... of the Russ fault, which bounds the Eel River syncline along its southern margin, can be traced seaward into the head of Eel Canyon ( Figure 2 ). Onshore, the Russ fault was mapped by Ogle (1953) as a vertical to steeply south–dipping reverse fault on which major movement is thought to predate deposition...

...Emile Rod ABSTRACT In the headwaters of Rio Yapacani, a tributary of Rio Mamore of north-central Bolivia, a rather complete stratigraphic section from the Tertiary Chaco group down to the quartzites of the Ordovician is exposed. The area of the upper Yapacani lies in the center of the big knee-bend...

... the unconformity at Marble Canyon (p. 911). Permian rocks form the capping stratum of all the mountains on the west side of Salt Flat, and in places extend nearly, if not quite, to the bases of the escarpments; the outcrops of the older rocks are discontinuous. The unconformity below the Permian extends...

... Bluff Shale Member of the Monterey Formation is dated as 16.5-14 Ma; the facies boundary between the Whiterock Bluff Shale Member and the Branch Canyon Sandstone is offset 3-3.4 km. Coeval subsidiary faults near the Russell fault in Miocene strata at least as young as 11 Ma also support distributed...

... by thickening and progressive rotation of supersalt strata as salt was evacuated from the base of the syncline ( Rowan et al., 2003 ) in a similar manner to that described for the Big Bend minibasin above. Thus, the base black-ledge unconformity is also a halokinetic sequence boundary (sensu Giles and Lawton...

... in the Echo Canyon and Weber Canyon conglomerates are shown in Figures 5A and 5B , and a detailed description of the lithology and depositional systems of each of these units can be found in DeCelles (1994) . Figure 5. (A) Generalized stratigraphic columns of Echo Canyon, Weber Canyon, Big Mountain...