. Classification of wetlands and deepwater habitats of the United States. Wetlands -- United States; Wetland ecology -- United States; Aquatic ecology -- United States. 70. Plate 23.—Classification: system Riverine, subsystem Upper Perennial, class Rock Bottom, subclass Bedrock, water regime Permanently Flooded, WATER CHEMISTRY Fresh. (Penobscot County, Maine; October 1977; Photo courtesy of R. W. Tiner). 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
. Classification of wetlands and deepwater habitats of the United States. Wetlands -- United States; Wetland ecology -- United States; Aquatic ecology -- United States. 70. Plate 23.—Classification: system Riverine, subsystem Upper Perennial, class Rock Bottom, subclass Bedrock, water regime Permanently Flooded, WATER CHEMISTRY Fresh. (Penobscot County, Maine; October 1977; Photo courtesy of R. W. Tiner). 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 U. S. Fish and Wildlife Service; Biological Services Program (U. S. ); Cowardin, Lewis M. Washington, D. C. : Fish and Wildlife Service, U. S. Dept. of the Interior
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