150 FLORIDA GEOLOGICAL SURVEY-TWELFTH ANNUAL REPORT 
Page 
New Smyrna, description of samples from well at_125 
depth to the Eocene at___124 
Northern Florida, Upper Eocene of_ 92 
North New River Canal_68, 74, 75 
Nummulites-82, 83, 84, 85, 86, 87, 88, 91, 92, 94, 96, 100, 101 
O. 
Observation Island____ 74 
Ocala formation-83, 85, 86, 87, 88, 89, 90, 91, 92, 94, 96, 98, 100, 101, 113, 114 
fossils characteristic of __ 96 
shallow water formation as shown by fossils_100 
thickness of -101, 114 
Ocklocknee River, exposures on_114, n6 
Okeechobee, description of samples from well at_ 126 
presence of Pliocene and Pleistocene in well samples from_103 
study of samples from well at_ 126 
thickness of the Miocene at _ 102 
Oligocene-69, 79, 82, 85, 91, 93, 94, 95, 96, 99, 101, 114, 116, 119, 131 
discussion of as shown by well samples_._102 
formations from wells of southern Florida _ 78 
thickness of in Florida_ 115 
Oodes Amavoides Dej. _ 6 
Oolitic marl or limestone -74, 78 
Operculina -82, 83, 84, 85, 90, 96 
Orange County, samples from well in _80, 89 
Orange Island _101 
Orange Mills, depth to Eocene limestone--125 
Orbitolina_82,-83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 94, 95, 96, 97, 98, 100, 102 
texana - 97 
Orbitolites _ 82 
Orthophragmina _ 96 
Ostracoda _ 77 
P. 
Palm Beach, depth to Eocene limestone at- 66 
depth to Miocene at --- j - 69 
Palm Beach limestone-118 
Palmetto Phosphate Company, depth to Eocene in well of-125 
discrepancies in study of samples from well of- 92 
study of samples from well of --- 9 1 
Panama Canal Zone, fossils from_,95, 102 
Panama City, depth to Eocene and Oligocene in well at- 119 
description of samples from well near- 119 
fossils of Tampa formation from well at-102 
study of samples from well at_79, 80, 98 
