[DATE OF SAMPLING UNKNOWN OR NOT APPLICABLE.] This citation is a field guide to 
the geology of South Florida and covers Florida Bay and the Reef Tract. Subjects 
discussed include water circulation, molluscan fauna, isotope record of circulation 
gradients and texture and composition of sediments. This is a reprint of the Guidebook 
for Field Trip 1, Geological Society of America (1964). 
1972 0 
Hughes, D. A. (1972) On the endogenous control of tide-associated displacements of pink 
shrimp, Penaeus duorarum Burkenroad. Biol. Bull.. 142:271-80. 
[DATE OF SAMPLING NOT AVAILABLE.] Swimming of both postlarval and juvenile pink 
shrimp was recorded in current chambers in the laboratory for three days following 
collection from Buttonwood Canal. In the apparent absence of environmental cues the 
animals maintained various forms of phase relationship with the tidal and diurnal 
cycles. Postlarvae manifested a pattern of swimming, markedly in phase with the 
semi-diurnal tide cycle. Upstream swimming took place during flood tides and 
downstream swimming during ebb tides. No circadian periodicity was found and the 
confining of their activity in nature to night-time is considered a direct response to 
prevailing light intensity. The patterns of swimming evidenced by juveniles differ 
depending, apparently, on some as yet undetermined aspect of the tide cycle to which 
they are exposed prior to collection. Individuals collected at times of new and full 
moon, when ebb tides occur early in the evening, exhibit a different pattern of 
swimming from those of individuals collected at times of quarter moons when ebb tides 
occur late at night. The patterns obtained are clearly endogenous although their 
adaptive phasing with the tidal and diurnal cycles is not always evident. 
1972 0 
Kerr, S. D. (1972) Patterns of coastal sedimentation: carbonate muds of Florida Bay. Am. 
Assoc. Petrol. Geol. Bull. . 56(3):632. 
[ABSTRACT ONLY. DATE OF SAMPLING UNKNOWN OR NOT APPLICABLE.] Muddy 
carbonate sediments of Florida Bay have accumulated in response to hydraulic process 
characteristic of coastal environments. These processes are reflected in faunal 
distribution as well as physiography of the accumulations. The frequently encountered 
coastal sedimentary pattern of ‘banks,’ ’lakes," and mainland veneer is expanded 
laterally in Florida Bay because of topography of the underlying Pleistocene rock 
surface. In Florida Bay the dominant physiographic pattern consists of circular "lakes" 
of deeper water surrounded by curvilinear banks and islands. The banks, composed 
predominantly of mud sediment, reach within a foot or so of mean sea level and are 
largest in the western bay nearest the open Gulf of Mexico. The northeastern or 
"interior" segment of the Bay is characterized by narrower banks, in many places 
exposed subaerially as islands. Spitlike accretion is apparent from growth lines on 
islands and some banks. This indicates locally directed currents; however, overall 
randomness of orientation and circular patterns of sediment distribution suggest that 
significant currents develop in all directions. The larger submerged banks of the 
"outer" Bay display prominent accretion lines and are in addition elaborately channeled. 
The channeling follows a distinctive cycle of establishment and decline that seems 
closely related to bank growth. Current control of deposition of muddy sediments is 
reflected also in the ancient sedimentary record, notably the Pennsylvanian Virgil 
"mounds" near Alamogordo, NM, and Pennsylvanian Lansing "mounds" in southeastern 
Kansas. Sediment-baffle processes previously proposed for the construction of mound- 
topography appear unneeded in as much as current processes may achieve similar 
results. 
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