... Simon Sandstone, Eau Claire Formation, Galesville Sandstone, Ironton Sandstone, and Franconia Formation. The Davis Formation replaces the latter three where they cannot be differentiated. The age of the Potsdam ranges from pre-Dresbachian through Franconian. The Knox Supergroup consists in ascending...

... bodies, the regional depositional histories of which are poorly understood. We have combined outcrop and subsurface data from six states to place the Upper Cambrian Wonewoc (Ironton and Galesville) Sandstone in a well-constrained stratigraphic framework across thousands of square kilometers...

...) . As used in this investigation, the Galesville of Michigan includes the Dresbach Sandstone and part of the Franconia Sandstone of earlier reports. Cohee (1945) evidently considered the Franconia of Michigan equivalent to the Ironton of Wisconsin, which overlies the Galesville in Wisconsin...

... fossils. He was familiar with the area and some of the residents since Sulphur Springs was the site where he first discovered the remains of his famous Missourium. He learned while he was there of human-like footprints fossilized in the local sandstone. These may have been Indian petroglyphs which Koch...

... of the Potosi (St. Lawrence) Dolomite of Trempealeauan age so that the Potsdam Megagroup includes not only the formations in the Dresbach Group but the Ironton Sandstone, the Franconia Formation, and even the Arcadia Sandstone at the base of the Trempealeauan. The Knox Group of eastern Tennessee (Knox...

... of the difficult stratigraphic problems of the Upper Mississippi Valley region is the determination, from drill cuttings, of the position of the contact between the basal St. Croixian and the top of the upper Keweenawan sandstones. The uppermost member of the Keweenawan sediments in Minnesota is the Hinckley...

... as Circular 15 of the Oklahoma Geological Survey. 4 The others, by Dake and Ulrich, are unpublished. These last two agree fairly well and give the Arbuckle limestone (including the Honey Creek limestone and the Reagan sandstone) a total thickness of about 6,700 feet. Decker’s figure is approximately 8,000...

..., Montana), formations (as Utica shale, Viola limestone, Meganos formation), members (as Plattsmouth limestone member, Ironton sandstone member, Montauk till member), lentils (as Horse Bench sandstone lentil, Franklindale limestone lentil), tongues (as Gober tongue of Austin chalk, Satan tongue of Mancos...

... in 1799 was a failure, owing to a combination of shipping difficulties and economic issues ( Cozzens, 1941a ). The first recorded smelting of iron ore in Missouri began in 1815 or 1816 at the so-called Ashebran furnace on Stout’s Creek in Iron County, approximately 3 km east of Ironton ( Parker, 1867...

.... —Pre-Pennsylvanian stratigraphic column of San Juan Mountains, southwestern Colorado. As shown by Baars (1958) and Loleit (1963) , these rocks can be correlated lithologically with the Tapeats Sandstone-Bright Angel Shale sequence in the Grand Canyon and with the Tintic Quartzite-Ophir Shale...

... surface. Figure 8. The rotation angle is the difference between the global coordinate system defined by north (in red) and the arbitrary LiDAR local coordinate system in which the LiDAR measurements are taken (in black). Two local sites were selected in a small local sandstone...

..., Decorah, Platteville, and St. Peter rocks. The St. Peter Sandstone overlies the Lone Rock Formation (Franconia), which is underlain by about 585 ft of Wonewoc Sandstone (Galesville plus Ironton). Six feet of Precambrian granite was drilled. SELECTED REFERENCES Angino , E. E. , et al ., 1971...

... to be obtained from the overlying Ironton–Galesville Formation, Mt. Simon sandstone, and the Pre-Mt. Simon unit. The pressure data from CCS1 and VW1 are used to calibrate the reservoir simulations over time. Figure 3. Geologic cross section between CCS1 and VW1. Yellow ports in CCS1 indicate...

... but in places is as much as 15 feet thick. This is the Ironton member of the Franconia in Wisconsin, considered to be the basal conglomerate of the formation. It serves to identify the contact of Eau Claire and Franconia where no Galesville separates them. The lower sandstone to sandy dolomite is very fine...

... of Cambrian strata (Log 1 in Fig. 10 ) in Fulton County (Sec. 32, T29N, R1E) with 1,250 ft (Log 2) in Vermillion County (Sec. 9, T16N, R9W). The section studied spans the interval from the base of the Knox Dolomite into the Mt. Simon Sandstone. Overall thickening of strata was expected in the 90 mi...

... in the Mount Simon Sandstone and St. Peter Sandstone–Prairie du Chien Group. In the Mount Simon Sandstone, relatively large differences occur in the Illinois basin at the southern end of the flow line. Head measurements in the Mount Simon Sandstone in the Illinois basin are extremely sparse. To compare our...

.... In it the authors 19 have listed a Dendrograptus from the Ironton member of the Franconia formation below the Eoorthis zone and far below the base of the Trempealeau formation. About 3,700 feet above the lower graptolite zone already noted and between 800 and 900 feet below the top of the Arbuckle...

... Mississippi Valley conulariid species based on specimens collected from a red, very fine-grained sandstone at Pilot Knob, Adams County, Wisconsin. The exact position of this locality is unclear. These rocks were assigned to the “middle beds of the upper Cambrian” by Walcott (1890 , p. 271). Raasch (1939 , p...

..., B ), the Eau Claire Formation conformably overlies the Mt. Simon Sandstone and is overlain by the Galesville and Ironton Sandstones ( Figure 1C ). Relatively few wells exist wherein the Eau Claire Formation interval was cored (either partially or wholly), thus hindering a thorough...

... of the layers of sandstone have small rounded pebbles, though not properly a conglomerate. Then comes a purplish sandstone. … From Hayden’s section most of the Cambrian formations can be clearly recognized; and the sequence is exactly as it can be seen to-day in the outcrops along the north bank...