236:
17:
128:
Thus, an isochore and isopach map are the same only when both the top and bottom surfaces of the layer shown are horizontal. When the layer shown is inclined, as is usually the case, the thicknesses displayed in an isochore map of the layer will be greater than the thicknesses displayed in an isopach
129:
map of the same layer. The terms isopach and isochore are widely confused, and many times maps of True
Vertical Thickness (TVT), which by definition are isochore maps, are incorrectly labeled isopach maps.
120:
An isopach map displays lines of equal thickness in a layer where the thicknesses are measured perpendicular to the layer boundaries. Isopach maps are also referred to as True
Stratigraphic Thickness (TST)
124:
An isochore map displays lines of equal thickness in a layer where the thicknesses are measured vertically. Isochore maps in geology are also referred to as True
Vertical Thickness (TVT) maps.
277:
217:
270:
177:
311:
263:
116:, but these terms actually describe different methods of displaying thickness variations within a layer.
214:
301:
296:
235:
306:
31:
8:
82:
94:
251:
98:
44:
221:
247:
290:
243:
90:
202:
Applied
Subsurface Geological Mapping with Structural Methods (2nd Edition),
86:
78:
102:
27:
16:
73:) illustrates thickness variations within a tabular unit, layer or
24:
74:
81:
of equal thickness over an area. Isopach maps are utilized in
56:
50:
62:
65:
53:
200:
Tearpock, Daniel J. and
Bischke, Richard E. (2002),
59:
47:
288:
197:W.H.Freeman and Company, San Francisco, 724 p.
271:
278:
264:
155:
153:
151:
204:Prentice- Hall, Englewood Cliffs 822 p.
23:showing true stratigraphic thickness of
15:
148:
139:
289:
159:Tearpock and Bischke (2002), chap. 14.
169:
167:
165:
230:
145:Levorsen (1967), p. 596-600 and 616.
13:
162:
14:
323:
208:
234:
43:
1:
187:
174:Isopach maps vs isochore maps
250:. You can help Knowledge by
7:
10:
328:
229:
178:www.structuralgeology.org
180:, accessed 5 April 2013.
132:
193:Levorsen, A.I. (1967),
34:
30:deposited offshore of
195:Geology of Petroleum,
19:
32:Pacifica, California
312:Sedimentology stubs
83:hydrographic survey
220:2011-06-07 at the
95:structural geology
35:
259:
258:
215:Oilfield Glossary
112:is similar to an
99:petroleum geology
319:
280:
273:
266:
238:
231:
181:
171:
160:
157:
146:
143:
72:
71:
68:
67:
64:
61:
58:
55:
52:
49:
327:
326:
322:
321:
320:
318:
317:
316:
287:
286:
285:
284:
227:
222:Wayback Machine
211:
190:
185:
184:
172:
163:
158:
149:
144:
140:
135:
77:. Isopachs are
46:
42:
12:
11:
5:
325:
315:
314:
309:
304:
299:
283:
282:
275:
268:
260:
257:
256:
239:
225:
224:
210:
209:External links
207:
206:
205:
198:
189:
186:
183:
182:
161:
147:
137:
136:
134:
131:
126:
125:
122:
9:
6:
4:
3:
2:
324:
313:
310:
308:
305:
303:
302:Sedimentology
300:
298:
297:Thematic maps
295:
294:
292:
281:
276:
274:
269:
267:
262:
261:
255:
253:
249:
246:article is a
245:
244:sedimentology
240:
237:
233:
232:
228:
223:
219:
216:
213:
212:
203:
199:
196:
192:
191:
179:
175:
170:
168:
166:
156:
154:
152:
142:
138:
130:
123:
119:
118:
117:
115:
111:
106:
104:
100:
96:
92:
91:sedimentology
88:
84:
80:
79:contour lines
76:
70:
40:
33:
29:
26:
22:
18:
307:Stratigraphy
252:expanding it
241:
226:
201:
194:
173:
141:
127:
114:isochore map
113:
109:
107:
87:stratigraphy
38:
36:
20:
110:isopach map
103:volcanology
39:isopach map
21:Isopach map
291:Categories
188:References
28:sediments
218:Archived
25:Holocene
75:stratum
242:This
133:Notes
121:maps.
248:stub
101:and
176:at
108:An
37:An
293::
164:^
150:^
105:.
97:,
93:,
89:,
85:,
57:oʊ
51:aɪ
279:e
272:t
265:v
254:.
69:/
66:k
63:æ
60:p
54:s
48:ˈ
45:/
41:(
Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.
