 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...  Report of Progress - Σελίδα 57των Geological Survey of Pennsylvania - 1891Πλήρης προβολή - Σχετικά με αυτό το βιβλίο
 | Edward Vincent D'Invilliers - 1891 - 460 σελίδες
...cent. of the entire group thickness, and that the good burning beds are to be sought in this series alone all through the Juniata district. The position...Valley synclinal at Lewisburg, making the boatshaped "Jliimestone ridge," in which several quarries have been opened. Here, and along the Mifflinburg limestone... | |
 | J. Peter Lesley - 1892 - 948 σελίδες
...zigzags in Union and Snyder counties. , copy f/JH(*l/J irt decon, Mfi/tfr ^oiiwCeld&ryry cvrak. M Jersey. In Union county the rocks of formation VI outcrop...the Mifflinburg limestone ridge the lower massive "Bossardville" beds of the group have been opened, without exhibiting any complete section. This division,... | |
 | Pennsylvania. Department of Forestry - 1915 - 540 σελίδες
...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,...thin, and are nowhere opened over 50' in thickness. Entering Hartley township the outcrop of Ore Sandstone is somewhat obscure in places; but seems to... | |
 | Pennsylvania. Department of Forestry - 1915 - 540 σελίδες
...Every effort has proved a failure, as well as in the Hudson River and Utiea slate formations of III. The rocks of formation VI outcrop through Gregg township,...thin, and are nowhere opened over 50' in thickness. Entering Hartley township the outcrop of Ore Sandstone is somewhat obscure in places; but seems to... | |
 | Pennsylvania. Department of Forests and Waters - 1915 - 538 σελίδες
...Every effort has proved a failure, as well as in the Hudson Eiver and Utica slate formations of III. The rocks of formation VI outcrop through Gregg township,...thin, and are nowhere opened over 50' in thickness. Entering Hartley township the outcrop of Ore Sandstone is somewhat obscure in places; but seems to... | |
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