. Breviora. 1974 lORAMINII FRAL DISTRIBUTION 19. >50X PORCELANEOUS FORAMINIFEHA JANUARY NORMAL ISOTHERMS MOISTURE BUDGET ISOPLETHS FLORIDA BAY Figure 9. Dominance of agglutinated, hyaline calcareous, and porcelaneous Foraminifera in the northern Gulf of Mexico paralic environments; including January normal isotherms after Espenshade (1960) , and moisture budget isopleths after Thornthwaite (1948) . included, essentially, within the same environmental zones as Mobile Bay. The moisture surplus is actually less than in the previous area, but this is compensated by the greater restriction from
. Breviora. 1974 lORAMINII FRAL DISTRIBUTION 19. >50X PORCELANEOUS FORAMINIFEHA JANUARY NORMAL ISOTHERMS MOISTURE BUDGET ISOPLETHS FLORIDA BAY Figure 9. Dominance of agglutinated, hyaline calcareous, and porcelaneous Foraminifera in the northern Gulf of Mexico paralic environments; including January normal isotherms after Espenshade (1960) , and moisture budget isopleths after Thornthwaite (1948) . included, essentially, within the same environmental zones as Mobile Bay. The moisture surplus is actually less than in the previous area, but this is compensated by the greater restriction from mixing with the open Gulf. To the southwest, Matagorda Bay and environs is within a warmer climatic zone and is also within a zone of only very slight moisture surplus. Emphasizing this lower moisture surplus is the lack of large rivers discharging fresh water into the bay. The result is relatively warm water with salinities near, but some- what less than, those of the adjacent Gulf. Commensurate with this rise in water temperature and salinity over that of Sabine Lake and Mobile Bay is a shift in the foraminiferal fauna. Here the hyaline calcareous forms dominate (Lehmann, 1957; Shen- ton, 1957). San Antonio Bay and environs displays an anomalous, but explicable, reverse in the environmental and faunal sequence (Parker, Phleger, and Peirson, 1953; Phleger, 1956; Shepard and Moore, 1955 and 1960), despite its position within the climatic trend to higher temperatures and greater moisture de- ficiency. The influx of fresh water to the bays from the relatively large San Antonio-Guadalupe River system is the cause of the much lower water salinity values here than in Matagorda Bay, which is in a general area of greater moisture surplus. There is a correlative shift in the foraminiferal fauna to one dominated. 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 ma
Size: 2268px × 1102px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorharvarduniversitymuseumofcomparative, bookcentury1900
