OFR 151.pdf - CRC LEME
OFR 151.pdf - CRC LEME OFR 151.pdf - CRC LEME
2. Otway Basin Oxygen isotope stratigraphies from Browns Creek and Castle Cove indicate sea surface temperatures (SSTs) decreased by up to 7 0 C during the terminal Eocene event, reaching a minimum value of ~13 0 C during the earliest Oligocene (Kamp et al. 1990). A rapid rise in SSTs during the Early Oligocene is explained by local warming within the Bight, where local circulation was effectively decoupled from the effects of the Circumantarctic Current. Foraminifera and mollusc faunas indicate significant warming across southern Australia during the Early Oligocene and Miocene, with maximum warmth reached in the early Middle Miocene (Li and McGowran 1997, McGowran and Li 1997, Li et al. 2000). On present indications, sea surface temperatures in the Otway Basin (and Murray, Bass and Gippsland Basins) were cooler than in the Eucla and St. Vincent Basins to the west. 269
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- Page 220 and 221: 2.2.5 Central southern Australia Ha
- Page 222 and 223: a number of distinctive Proteaceae
- Page 224 and 225: Inferred climate The Regatta Point
- Page 226 and 227: 3. TIME SLICE T-3 Age Range: Middle
- Page 228 and 229: 2. Lake Torrens Basin Abundant leaf
- Page 230 and 231: Dominance is highly variable. For e
- Page 232 and 233: types (M.K. Macphail unpubl. data).
- Page 234 and 235: Dacrycarpus), Euphorbiaceae (Austro
- Page 236 and 237: (possibly upper mesotherm) and drie
- Page 238 and 239: Basin) on the Eyre Peninsula (Alley
- Page 240 and 241: explanation is that a warm water gy
- Page 242 and 243: several taxa, which first appear in
- Page 244 and 245: 4. TIME SLICE T-4 Age Range: Oligoc
- Page 246 and 247: Inferred climate The southern limit
- Page 248 and 249: The lowest and possibly the oldest
- Page 250 and 251: Dominants include fresh to brackish
- Page 252 and 253: Based on the relative abundance of
- Page 254 and 255: (Morgan 1977, McMinn 1981a, Martin
- Page 256 and 257: common (up to 5-6%) in the middle s
- Page 258 and 259: Polypodiaceae, Palmae (Dicolpopolli
- Page 260 and 261: Strasburgeriaceae. Proprietary info
- Page 262 and 263: Rare taxa which first appear in the
- Page 264 and 265: Correlative microfloras in the onsh
- Page 266 and 267: impression of floristic impoverishm
- Page 268 and 269: (Lophosoria) reached Tasmania befor
- Page 272 and 273: 5. TIME SLICE T-5 Age Range: Late M
- Page 274 and 275: Casuarinaceae, Cunoniaceae, Elaeoca
- Page 276 and 277: maximum temperature of the hottest
- Page 278 and 279: Nothofagus-gymnosperm temperate rai
- Page 280: 5.2.7 Tasmania Late Neogene sedimen
2. Otway Basin<br />
Oxygen isotope stratigraphies from Browns Creek and Castle Cove indicate sea surface<br />
temperatures (SSTs) decreased by up to 7 0 C during the terminal Eocene event, reaching a<br />
minimum value of ~13 0 C during the earliest Oligocene (Kamp et al. 1990). A rapid rise in<br />
SSTs during the Early Oligocene is explained by local warming within the Bight, where local<br />
circulation was effectively decoupled from the effects of the Circumantarctic Current.<br />
Foraminifera and mollusc faunas indicate significant warming across southern Australia<br />
during the Early Oligocene and Miocene, with maximum warmth reached in the early Middle<br />
Miocene (Li and McGowran 1997, McGowran and Li 1997, Li et al. 2000). On present<br />
indications, sea surface temperatures in the Otway Basin (and Murray, Bass and Gippsland<br />
Basins) were cooler than in the Eucla and St. Vincent Basins to the west.<br />
269
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