. Bulletin. Natural history; Natuurlijke historie. ORDOVICIAN APPALACHIAN ECOLOGY LATE ORDOVICIAN FAUNAL ASSOCIATIONS 55. FIG. 24. Distribution of Late Ordovician faunal associations (Communities) in the central Ap- palachians. The data from Figures 13, 14, 16 and 17 are combined to form this distributional pattern (see Table 9 for species composition). Figure 6 outlines the stratigraphic relationships of the faunal association overlaps. The communities are: 1. Sowerbyella-Onniella Community 2. Orthorhynchula-Ambonychia Community 3. Zygospira-Hebertella Community Recent environments, an area o
. Bulletin. Natural history; Natuurlijke historie. ORDOVICIAN APPALACHIAN ECOLOGY LATE ORDOVICIAN FAUNAL ASSOCIATIONS 55. FIG. 24. Distribution of Late Ordovician faunal associations (Communities) in the central Ap- palachians. The data from Figures 13, 14, 16 and 17 are combined to form this distributional pattern (see Table 9 for species composition). Figure 6 outlines the stratigraphic relationships of the faunal association overlaps. The communities are: 1. Sowerbyella-Onniella Community 2. Orthorhynchula-Ambonychia Community 3. Zygospira-Hebertella Community Recent environments, an area of low primary benthonic productivity and poor cir- culation with a low level of oxidation, which is expressed in the texture and colora- tion of the sediments. The areas of high fossil diversities (A and A' in Fig. 28) indi- cate regions of high primary productivity, normal marine bottom salinities, hence adequate circulation, and suitable substratum attachment sites for the numerous benthic, epifaunal suspension feeding trepostomatous bryozoans (A') and the articu- late brachiopods (A and A'). Also included in the high diversity in the north (A) are high numbers of infaunal deposit-feeding protobranch bivalve molluscs, which emphasize not only an adequate food supply for the suspension feeders but sufficient organic detritus to support a major infaunal 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 Peabody Museum of Natural History. New Haven : The Museum
Size: 1707px × 1463px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookcollectionbiodiv, booksubjectnaturalhistory
