Revision of the Paleozoic systems

Geology and ore deposits of the Picher field, Oklahoma and Kansas

“…The Upper Devonian species are common to the Chattanooga Shale of central Tennessee, whereas the Mississippian species are those found in the Maury Formation (Kinderhook) that overlies the Chattanooga unconformably in central Tennessee. Equivalence in stratigraphic position and the lithologic identity of the black shale and its basal phosphatic sandstone over wide areas early led Ulrich (in Adams and Ulrich, 1905;1911), Moore (1928), and others to correlate the southwest Ozark occurrences with the type area of the Chattanooga, even when the faunas were less well known and more characterized by the similarity in their meagerness than by any positive correlation criterion.…”

Upper Ordovician and Silurian stratigraphy in Sequatchie Valley and parts of the adjacent valley and ridge, Tennessee

“…To the west, the strata become more calcareous; the boundary itself is within strata dominated by carbonate rocks (Wilson, 1949;Rodgers, 1953 (Rodgers, 1953). Equivalent strata to the west are thinner and more calcareous and were named Sequatchie by Ulrich (1911).…”

Ordovician Gastropoda from Northeast Greenland

“…-Straparollina is one of the most common specimens in the Greenland material. The shell is like Sinuopea Ulrich, 1911 [for example, P. (?)…”