The Quarterly journal of the Geological Society of London . and fossil-content, from the succeedingstrata, and correspond to the Dayia Shales of the Ludlow district. The junction between the Dayia Shales and the RkyncJionellaBeds is not well marked, but some bands of massive, hard, blueflagstone usually occur about this horizon. A few remarks on the apparently anomalous variation in thicknessof the Aymestry Limestone may not be out of place here. TheLimestone, which is about 100 feet thick at Ludlow, thickenswestwards to 250 feet at Mocktree Hill—only 6 or 7 mileseast of Bucknell—and, while kn
The Quarterly journal of the Geological Society of London . and fossil-content, from the succeedingstrata, and correspond to the Dayia Shales of the Ludlow district. The junction between the Dayia Shales and the RkyncJionellaBeds is not well marked, but some bands of massive, hard, blueflagstone usually occur about this horizon. A few remarks on the apparently anomalous variation in thicknessof the Aymestry Limestone may not be out of place here. TheLimestone, which is about 100 feet thick at Ludlow, thickenswestwards to 250 feet at Mocktree Hill—only 6 or 7 mileseast of Bucknell—and, while known to occur at Pedwardine1(imuiediatekv east of the Church-Stretton Fault near Bucknell). ithas absolutely disappeared in the area here mapped. Determinations of Calcium Carbonate in Ludlow 1. Aymestry Limestone, Mocktree Hill. Block in fresh condition, with characteristic fauna of Conclidium lenightiiand Atrypa Aymestry Limestone, Pedwardine. A band of nodular limestone with abundant corals (Halt/sites, Favosites,etc.). One of the persistent bands of true Dayia Beds, road from Chapel Lawn to Pentre Hodrey. Massive dark Rhynchonella Beds, near Chapel Lawn. Hard, blue, massive flagstone at the base of the Rhynchonella Beds, Selley Cross. Typical specimen from the upper Chonetes Beds, Hodrey specimen. The above determinations of the amount of calcium carbonatepresent in the various Ludlow rocks have revealed the followinginteresting facts :— (1) The bulk of the Aymestry Limestone with its typical fauna at MocktreeHill is only slightly more calcareous than the Rhynchonella or Chonetes Flagsof Clun Forest. (2) The Aymestry Limestone at Mocktree Hill is really a calcareous flag-stone, with certain bands
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Keywords: ., bookcentury1800, bookdecade1840, bookidquarte, booksubjectgeology
