Report of ProgressBoard of Commissioners for the Second Geological Survey, 1891 35 vols. are atlases. |
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Andere Ausgaben - Alle anzeigen
Häufige Begriffe und Wortgruppen
anticlinal axis black slate Bloomsburg red shale Buffalo mountain Catskill Centre county Chemung clinal Clinton rocks Clinton shales county line crest Danville beds developed eastward exposed exposure farm formation furnace further west gray Hamilton Huntingdon county Iron sandstone Jack's mountain Juniata county Juniata river kiln Kishacoquillas valley largely Lewistown Lewistown limestone limestone ridge lower Clinton Lower Helderberg limestone lower Salina Mahantango creek Marcellus slate massive McVeytown Medina sandstone Middle creek Mifflin county miles long miles west mill mined narrow nearly north and south north dip north flank north side northwest Oneida sandstone opened ore-bed Oriskany sandstone outcrop Penns creek portion quarry railroad road Salina lime shales Salina rocks Sand Vein Selinsgrove Shade mountain shaly Shamokin mountain shows slate valley Snyder county soft fossil south dip south side stone synclinal thick thin township line Tuscarora Union and Snyder Union county upper Salina lime VIII westward White Deer yards
Beliebte Passagen
Seite 88 - No work has been done at this opening for nearly 3 years, so that the facts are recorded simply as Mr. Tate has kindly offered them. No limestone is reported to occur at or near the opening and the raw material, as mined, is intensely black, without grit and sooty. It stains the fingers as lamp-soot would do, and when used as a pigment it is said to be very durable and will not fade. It has been shipped to Williamsport, Reading, Harrisburg and elsewhere through central Pennsylvania.
Seite xiii - ... animal fat in them, which time has changed and hardened into asphalt, so that specimens put into a blacksmith's fire will fry and flame for a few minutes. But no one has ever seen or heard of a coal bed in these formations. There is not a ton of real coal in the whole county. All the formations in the district are much older than the coal measures and were deposited before the first coal bed was made.
Seite 57 - Jnniata district. The position of this series is shown on the map by a deep blue tint. In Union county the rocks of formation VI outcrop through Gregg township, where the beds are thin, and are nowhere opened over 50' in thickness. The Lower Helderberg limestones "are next seen in the Buffalo Valley synclinal at Lewisburg, making the boatshaped " Limestone ridge" in which several quarries have been opened.
Seite 56 - The total thickness of the group averages about 250' as against 350' in Huntingdon, and 250' in Perry. It must be remembered in comparing these sections that the ''Bossardville limestone" group of the Susquehanna, corresponds to No. 5 of the Perry county section and to No. 2 of the Huntingdon county section, the lower division of the latter 170...
Seite 23 - ... refers chiefly to the part of the division that lies in Centre county. That portion of the division that lies in Hartley township in Union county, which includes the part that lies on the eastern part of Paddy Mountain and White Mountain, is now to be considered. The White Mountain anticlinal is of only slight importance in Union county, extending for about 4 miles east of the Mifflin county line, but subsiding so rapidly eastward that the red and white Medina No. IV, the lower Clinton and Ore...
Seite 126 - ... the ridge, about 6' deep, struck a 12" ore bed dipping steeply (60°) southeast. The ore was fair. North and south of this about 30 and 40 yards the ore outcrops again, making a, double synclinal and anticlinal. A short distance east where the ridge is cut off in a bluff facing Penns creek at Weikert station, the first or most northern outcrop is opened 12...
Seite 59 - It is about 140' thick. The Lewistown limestone is about 185' thick here, showing several massive beds of blue limestone, largely quarried for lime and furnace flux. But the good portion of the deposit does not comprise more than 60
Seite 87 - RRR, and about 1£ miles north of Allenwood. It is presumably the Marcellus ore bed which had been developed here, although unfortunately the opening was so badly fallen in as to prevent any personal examination. Mr. Tate reports that the main drift had been driven 75 yards west into the hill, with gangways north...
Seite 47 - Marcellus black slate has been a very fruitful source of disaster to many coal mining companies throughout the district, which have labored long and earnestly to find coal in them. Every effort has proved a failure, as well as similar operations in the Hudson River and Utica slate formations No. III. Union county contains only a very small amount of the No. VIII formation, caught in the Buffalo valley synclinal north of Lewisburg, where perhaps the whole of the Marcellus formation exists, but little...
Seite 47 - ... in the Buffalo Valley synclinal north of Lewisburg, where perhaps the whole of the Marcellus formation exists, but little if any of the overlying Hamilton. The Marcellus black slate has been a very fruitful source of disaster to several coal mining companies in the district, which have labored long to find coal in them. Every effort has proved a failure, as well as in the Hudson River and Utica slate formations of III. The rocks of formation VI outcrop through Gregg township, where the beds are...