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51:
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rose almost as much as during the late Eocene. Parts of the platform remained above water creating Orange Island, a low relief island just 150 km (93 mi) south of the
Oligocene Georgia coastline and Bainbridge Subsea with a shallow channel, the
269:
Bryan, J.R., 1991, Stratigraphic and paleontologic studies of
Paleocene and Oligocene carbonate facies of the eastern Gulf Coastal Plain: unpublished Ph.D. dissertation, University of Tennessee, Knoxville,
205:
remained at 250 meters (850 feet) deep. Orange Island had its own rivers carrying sediments composed of sand and clay in to the Yeehaw Strait at Orange Island's southern tip.
177:
During the middle
Oligocene ~25 Ma, a worldwide cooling of the climate started the drying of the Dade Subsea, Gulf Trough, and in turn enlarging Orange Island. During the
105:, a lack of deposition with reference to the eastern side of the Ocala Platform indicates this area as Orange Island. The island also bounded the
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bank with shallow sea covering it. During the Eocene, biological carbonates were deposited on this bank forming various layers. The
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170:. The western side of the island was bounded by the Pasco Reef System, an environment now only found in the southern
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Petuch, Edward J., Roberts, Charles; The geology of the
Everglades and adjacent areas, 2007,
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with
Hillsborough Lagoon System on the west and Caloosahatchee Lagoon System on the east.
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of the early
Miocene, Orange Island expanded both northward and westward with carbonate
158:
or
Suwannee Strait, separating the two. The shallower Gulf Trough now supported a large
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began their movement into what is now
Florida with earliest of their fossils found in
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50:
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running north to south. Edward J. Petuch states that Orange Island was a dominant
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extending to the Salt
Mountain Formation and Flint River Formation of southern
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Orange Island's general location is east of or on the eastern part of the
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55:
24:
20:
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USGS: Geologic units in
Hillsborough county, Florida: Suwannee Limestone
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due to either erosion or lack of deposition of material.(J. R. Bryan).
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periods of rising water and not unlike that of the river bank of the
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Flora of North America, Volume 1, Chapter 6, Flora of North America
73:
49:
28:
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dating to 24.8 Ma. Also from that Chattian stage through early
291:
Paleobiology database, Brooksville 1 Collection, 24.8-24.7 Ma.
201:
system on its west side. To the south of Orange Island, the
137:
were formed at this time. Orange Island appears absent of
8:
121:~55.8—33.9 Ma., what was to become Florida (
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208:Orange Island appears to have been a
7:
23:of Florida dating from the middle
14:
101:According to J. R. Bryan and the
103:United States Geological Survey
1:
341:
320:Natural history of Florida
236:in the Florida panhandle.
19:is the earliest emergent
168:Mitchell County, Georgia
149:By the Early Oligocene,
45:United States of America
145:Birth of Orange Island
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66:
41:Orange County, Florida
228:, the red hills near
77:
53:
39:epoch and named for
131:Avon Park Formation
325:Geology of Florida
226:Apalachicola River
212:animal and floral
139:Suwannee Limestone
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67:
54:Depiction of mid (
230:Marianna, Florida
95:Bainbridge Subsea
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293:
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203:Everglades Basin
123:Florida Platform
117:During the warm
99:Florida Platform
91:geomorphological
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218:central Florida
191:Hernando County
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135:Ocala Limestone
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107:Okeechobean Sea
93:feature of the
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60:Early Oligocene
37:Early Oligocene
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11:
5:
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232:, and coastal
195:Aquitanian age
183:Late Oligocene
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109:to its south.
87:Ocala Platform
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33:geologic stage
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172:Pacific Ocean
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79:Orange Island
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63:Orange Island
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17:Orange Island
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222:interglacial
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187:land mammals
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16:
15:
220:during the
210:Pleistocene
156:Gulf Trough
27:~33.9—28.4
314:Categories
240:References
174:(Petuch).
160:coral reef
151:sea levels
234:flatwoods
127:carbonate
214:refugium
179:Chattian
125:) was a
70:Location
56:Rupelian
25:Rupelian
21:landmass
181:of the
164:Alabama
113:Origins
97:on the
35:of the
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199:lagoon
119:Eocene
254:ISBN
216:for
133:and
270:TN.
166:to
316::
185:,
58:)
47:.
43:,
31:.
29:Ma
260:.
65:.
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