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The Student’s Elements of Geology
Contents:
Lower Llandovery Rocks.
Below the May-Hill Group are the Lower Llandovery Rocks, which consist chiefly of hard slaty rocks, and beds of conglomerate from 600 to 1000 feet in thickness. The fossils, which are somewhat rare in the lower beds, consist of 128 known species, only eleven of which are peculiar, 83 being common to the May-Hill group above, and 93 common to the rocks below. Stricklandinia (Pentamerus) levis, which is common in the Lower Llandovery, becomes rare in the Upper, while Pentamerus oblongus (Figure 546), which is the characteristic shell of the Upper Llandovery, occurs but seldom in the Lower.
Contents:
Chicago: Charles Lyell, "Lower Llandovery Rocks.," The Student’s Elements of Geology, ed. Bryant Conant, James and trans. Babington, B. G. (Benjamin Guy), 1794-1866 in The Student’s Elements of Geology Original Sources, accessed October 13, 2024, http://www.originalsources.com/Document.aspx?DocID=H3A11XB91P1WETR.
MLA: Lyell, Charles. "Lower Llandovery Rocks." The Student’s Elements of Geology, edited by Bryant Conant, James, and translated by Babington, B. G. (Benjamin Guy), 1794-1866, in The Student’s Elements of Geology, Original Sources. 13 Oct. 2024. http://www.originalsources.com/Document.aspx?DocID=H3A11XB91P1WETR.
Harvard: Lyell, C, 'Lower Llandovery Rocks.' in The Student’s Elements of Geology, ed. and trans. . cited in , The Student’s Elements of Geology. Original Sources, retrieved 13 October 2024, from http://www.originalsources.com/Document.aspx?DocID=H3A11XB91P1WETR.
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