. Bulletins of American paleontology. 26 Bulletin 353 CHAMBERLAIN BRANCH (m) (ft) 50- 160- 150- 140- 40- 130- 120- 110- 30- 100- 90- - 80-. 60- - 50-- Text-figure 8.—Range chart of trepostome bryozoan species occurring at the Chamberlain Branch and the relationship of this d: to boundaries of Bryozoan Assemblages 1, 2 and 3 and Biostratigraphic Units I-V and A-C. See Text-figure 7 for further expl symbols used. bution of species only occurring at Chamberlain Branch), and Tarphophragma ampla (within Unit II to the east) ex- clusive of species appearing for the first time higher in the section (
. Bulletins of American paleontology. 26 Bulletin 353 CHAMBERLAIN BRANCH (m) (ft) 50- 160- 150- 140- 40- 130- 120- 110- 30- 100- 90- - 80-. 60- - 50-- Text-figure 8.—Range chart of trepostome bryozoan species occurring at the Chamberlain Branch and the relationship of this d: to boundaries of Bryozoan Assemblages 1, 2 and 3 and Biostratigraphic Units I-V and A-C. See Text-figure 7 for further expl symbols used. bution of species only occurring at Chamberlain Branch), and Tarphophragma ampla (within Unit II to the east) ex- clusive of species appearing for the first time higher in the section (defining Units B and C). Unit B is marked by the initial appearances of Batostomella sub- gracilis. Parvohallopora granda. Perotwpora weirae, and possibly Heterotrypa magnopora (occurs in up- permost Unit A at Chamberlain Branch, but in Unit B at all other sections). Parvohallopora granda var. in- ftata is found in the uppermost strata at Wilson Branch and is the only representative of Unit V to occur to the west and hence is assigned to Unit C in order to point out this position high in each section. These spe- cies defining Units A-C are the basis for forming what is believed to be the best defined and consistently de- veloped correlatable units presently available among all sections of the study area. Inconsistencies in the relative distributions of taxa among the study localities are possibly due in part to the vagaries of sampling (, differences in sample. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Paleontological Research Institution (Ithaca, N. Y. ); Columbia University. Ithaca, N. Y. , Paleontological Research Institution [etc. ]
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