263:
225:
of the
Transvaal Supergroup continental sea, at some 2.550 Ga. This resulted in a carbonate platform in the Transvaal and Griqualand West Basins, lasting for 30–50 Ma.
229:
were deposited during this period over the Nauga
Formation carbonates. Following this a subsidence led to immersion of the stromatolitic platform and to sediments of iron-rich
205:
developed in the basin of the
Kaapvaal craton. Oldest was the Schmidtsdrif Subgroup, deposited in the southwestern part of the basin, showing stromatolitic carbonates,
261:
Deconstructing the
Transvaal Supergroup, South Africa:Implications for Palaeoproterozoic palaeoclimate models - John M. Moore, Harilaos Tsikos and Stefane Polteau
260:
153:
157:
192:
161:
149:
54:
306:
171:-bounded sequences that surface in two geographically distinct areas – the Transvaal Basin, which circumscribes the
301:
249:
180:
172:
230:
222:
114:
110:
8:
202:
129:
267:
176:
145:
118:
280:
An overview of the geology of the
Transvaal Supergroup dolomites (South Africa),
214:
295:
206:
137:
69:
56:
195:
as the Kanye Basin. The two basins are separated by the broad
Vryburg Arch.
199:
168:
42:
283:
125:
218:
89:
282:
Environmental
Geology November 1998, Volume 36, Issue 1-2, pp 179-188
210:
133:
122:
188:
97:
93:
38:
148:
played an intermittent role. The supergroup is made up of basal ‘
141:
198:
Between approximately 2.640 and 2.516 Ga, two successive
184:
28:
226:
187:
at the western
Kaapvaal craton rim, extending into southern
132:basin is thought to have been derived largely from
293:
221:in the southwest, which were inundated during a
213:. This was followed by the Nauga formation
167:The Transvaal Supergroup displays three
233:being laid down over the entire basin.
16:Geological basin of the Kaapvaal craton
294:
13:
121:. The evolution of this 2.65–2.05
14:
318:
152:’ rocks, upon which followed the
278:P. G. Eriksson, W. Altermann;
272:
254:
243:
1:
236:
307:Sedimentary basins of Africa
20:Geography of Transvaal Basin
7:
10:
323:
85:
48:
34:
24:
173:Bushveld Igneous Complex
302:Geology of South Africa
250:Encyclopædia Britannica
231:banded iron formations
179:basin, lying between
223:marine transgression
209:sediments and small
154:Black Reef Formation
115:Transvaal Supergroup
203:carbonate platforms
70:25.1577°S 26.7364°E
66: /
21:
266:2011-07-18 at the
160:and the uppermost
158:Chuniespoort Group
19:
130:Palaeoproterozoic
103:
102:
75:-25.1577; 26.7364
314:
286:
276:
270:
258:
252:
247:
109:is one of three
81:
80:
78:
77:
76:
71:
67:
64:
63:
62:
59:
22:
18:
322:
321:
317:
316:
315:
313:
312:
311:
292:
291:
290:
289:
277:
273:
268:Wayback Machine
259:
255:
248:
244:
239:
219:peritidal flats
177:Griqualand West
146:plate tectonics
119:Kaapvaal craton
107:Transvaal Basin
74:
72:
68:
65:
60:
57:
55:
53:
52:
17:
12:
11:
5:
320:
310:
309:
304:
288:
287:
271:
253:
241:
240:
238:
235:
193:Kalahari Sands
162:Pretoria Group
101:
100:
87:
83:
82:
50:
46:
45:
36:
32:
31:
26:
15:
9:
6:
4:
3:
2:
319:
308:
305:
303:
300:
299:
297:
285:
281:
275:
269:
265:
262:
257:
251:
246:
242:
234:
232:
228:
224:
220:
217:deposited on
216:
212:
208:
207:siliciclastic
204:
201:
200:stromatolitic
196:
194:
190:
186:
182:
178:
174:
170:
165:
163:
159:
155:
151:
147:
143:
139:
138:palaeoclimate
135:
131:
127:
124:
120:
116:
112:
108:
99:
95:
91:
88:
84:
79:
51:
47:
44:
40:
37:
33:
30:
27:
23:
279:
274:
256:
245:
197:
191:beneath the
169:unconformity
166:
150:protobasinal
106:
104:
43:South Africa
126:Neoarchaean
73: /
49:Coordinates
296:Categories
237:References
215:carbonates
211:lava flows
175:, and the
90:Mozambique
61:26°44′11″E
58:25°09′28″S
181:Kimberley
134:magmatism
25:Continent
284:abstract
264:Archived
189:Botswana
144:, while
98:Zimbabwe
94:Botswana
39:Eswatini
142:eustasy
117:on the
113:of the
86:Borders
227:Shales
185:Sishen
111:basins
35:Region
29:Africa
183:and
140:and
105:The
298::
164:.
156:,
136:,
123:Ga
96:,
92:,
41:,
128:–
Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.