Geologic structure and orogenic history of Venezuela: text to accompany the author's geologic tectonic map of Venezuela
Gespeichert in:
| 1. Verfasser: | |
|---|---|
| Format: | Buch |
| Sprache: | English |
| Veröffentlicht: |
New York, NY
Soc.
1952
|
| Schriftenreihe: | Geological Society of America
49 |
| Online-Zugang: | Inhaltsverzeichnis |
| Beschreibung: | VII, 113 S. Ill., graph. Darst. |
Internformat
MARC
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| 100 | 1 | |a Bucher, Walter Hermann |e Verfasser |4 aut | |
| 245 | 1 | 0 | |a Geologic structure and orogenic history of Venezuela |b text to accompany the author's geologic tectonic map of Venezuela |c by Walter H. Bucher |
| 264 | 1 | |a New York, NY |b Soc. |c 1952 | |
| 300 | |a VII, 113 S. |b Ill., graph. Darst. | ||
| 336 | |b txt |2 rdacontent | ||
| 337 | |b n |2 rdamedia | ||
| 338 | |b nc |2 rdacarrier | ||
| 490 | 1 | |a Memoir / Geological Society of America |v 49 | |
| 830 | 0 | |a Geological Society of America |t Memoir |v 49 |w (DE-604)BV035915045 |9 49 | |
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| 999 | |a oai:aleph.bib-bvb.de:BVB01-021846009 | ||
Datensatz im Suchindex
| _version_ | 1804144743593017344 |
|---|---|
| adam_text | Titel: Geologic structure and orogenic history of Venezuela
Autor: Bucher, Walter H
Jahr: 1952
CONTENTS
Page
Preface..............................................................................................................................1
Acknowledgments............................................................................................................3
Mabacaibo Basin..............................................................................................................5
I. Eastern foothills of the Sierra de Perijâ........................................................5
II. Folds west and north of Maracaibo................................................................6
III. The basin as a whole and its northeastern border........................................8
Venezuelan Andes.................................................................13
I. Unconformities and orogenic history..............................................................13
1. Pre-Permo-Carboniferous rocks..........................................................13
2. Post-Devonian, pre-Cretaceous rocks................................................14
3. Pre-Tomon red beds..............................................................................15
4. Cretaceous-Eocene sequence................................................................16
5. Two great Cenozoic unconformities..................................................17
6. Young granites......................................................................................IS
II. Structural plan of the Andes............................................................................19
1. Shape of the pre-Cretaceous core...................................19
2. Dominant fault pattern........................................................................20
3. Asymmetry of the Andes....................................................................23
III. Structure pattern of the Tâchira depression..................................................25
Falcon Region..................................................................................................................31
I. Fold pattern in general and its relation to the trough of post-Eocene
sedimentation..................................................................................................31
II. Orogenic phases and resulting unconformities..............................................31
General statement......................................................................................31
1. Uppermost Eocene orogenic phase....................................................31
2. Middle Oligocène orogenic phase........................................................32
3. Intra-Miocene regression and local unconformities........................33
4. Pre-Pleistocene uplift and unconformity............................................34
III. Structural pattern of the folds........................................................................34
1. Ground plan..........................................................................................34
2. Cross section..........................................................................................35
IV. Paraguanâ axis....................................................................................................36
Western Caribbean Mountains..................................................................................39
I. Definition as structural unit............................................................................39
II. Cretaceous age of the metamorphic rocks......................................................39
General statement......................................................................................39
1. Absence of the characteristic older rocks of the Andes..................40
2. Transition from unmetamorphosed to metamorphosed rocks of
Cretaceous and Eocene age............................................................40
3. Major stratigraphie units and their structural relations................41
III. Cretaceous and Eocene intrusive rocks..........................................................50
IV. Unconformities and orogenic history..............................................................51
1. Intra-Senonian unconformity..............................................................51
2. Pre-Oligocene unconformity................................................................57
3. Intra-Miocene unconformity..............................................................58
4. Pre-Pleistocene (or mid-Pleistocene?) unconformity......................59
V. Structure pattern of the Western Caribbean Mountains............................60
Page
Paraguana and Goajira Peninsulas and the Islands North of the Vene-
zuelan Coast..................................................................................................................63
I. Age of the metamorphics..................................................................................63
1. Paraguana Peninsula............................................................................63
2. Goajira Peninsula..................................................................................64
3. Aruba, Curaçao, Bonaire Islands........................................................66
4. Smaller groups of the northern chain of islands..............................66
5. Margarita Island..................................................................................67
6. Tobago Island........................................................................................68
II. Unconformities and orogenic history..............................................................68
1. Intra-Senonian (or pre-Senonian?) inconformity............................68
2. Upper Eocene unconformity................................................................70
3. Late Tertiary unconformity and the mid-Pleistocene orogenesis 71
Eastern Caribbean Mountains, Including the Northern and Central
Range of Trinidad......................................................................................................73
I. Definition as structural unit and comparisons..............................................73
II. Age of the metamorphic rocks..........................................................................75
III. Unconformities and orogenic history..............................................................80
1. Intra-Senonian orogeny?......................................................................80
2. Pre-Uppermost Eocene orogeny..........................................................81
3. Later orogenies............................................................................................81
IV. Structure pattern of the Eastern and Western Caribbean Mountains in
its broader aspects..........................................................................................82
Eastern Venezuelan Basin and Southern Trinidad............................................85
I. Eastern part........................................................................................................85
1. Shape and depth of basin....................................................................85
2. Structure of the steep north side of the basin..................................85
3. Mud volcanos........................................................................................86
4. Subsurface structures of the south side of the basin......................88
II. The Central Part................................................................................................90
El Baul Swell, Apure Basin, and the Western Part of the East Vene-
zuelan Basin..................................................................................................................93
I. Age of the metamorphic rocks........................................................................93
II. EI Bàul Swell......................................................................................................95
Guayana Shield................................................................................................................97
References........................................................................................................................101
Index....................................................................................................................................106
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| id | DE-604.BV026263284 |
| illustrated | Illustrated |
| indexdate | 2024-07-09T23:08:25Z |
| institution | BVB |
| language | English |
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| physical | VII, 113 S. Ill., graph. Darst. |
| publishDate | 1952 |
| publishDateSearch | 1952 |
| publishDateSort | 1952 |
| publisher | Soc. |
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| series | Geological Society of America |
| series2 | Memoir / Geological Society of America |
| spelling | Bucher, Walter Hermann Verfasser aut Geologic structure and orogenic history of Venezuela text to accompany the author's geologic tectonic map of Venezuela by Walter H. Bucher New York, NY Soc. 1952 VII, 113 S. Ill., graph. Darst. txt rdacontent n rdamedia nc rdacarrier Memoir / Geological Society of America 49 Geological Society of America Memoir 49 (DE-604)BV035915045 49 HBZ Datenaustausch application/pdf http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&local_base=BVB01&doc_number=021846009&sequence=000002&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA Inhaltsverzeichnis |
| spellingShingle | Bucher, Walter Hermann Geologic structure and orogenic history of Venezuela text to accompany the author's geologic tectonic map of Venezuela Geological Society of America |
| title | Geologic structure and orogenic history of Venezuela text to accompany the author's geologic tectonic map of Venezuela |
| title_auth | Geologic structure and orogenic history of Venezuela text to accompany the author's geologic tectonic map of Venezuela |
| title_exact_search | Geologic structure and orogenic history of Venezuela text to accompany the author's geologic tectonic map of Venezuela |
| title_full | Geologic structure and orogenic history of Venezuela text to accompany the author's geologic tectonic map of Venezuela by Walter H. Bucher |
| title_fullStr | Geologic structure and orogenic history of Venezuela text to accompany the author's geologic tectonic map of Venezuela by Walter H. Bucher |
| title_full_unstemmed | Geologic structure and orogenic history of Venezuela text to accompany the author's geologic tectonic map of Venezuela by Walter H. Bucher |
| title_short | Geologic structure and orogenic history of Venezuela |
| title_sort | geologic structure and orogenic history of venezuela text to accompany the author s geologic tectonic map of venezuela |
| title_sub | text to accompany the author's geologic tectonic map of Venezuela |
| url | http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&local_base=BVB01&doc_number=021846009&sequence=000002&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA |
| volume_link | (DE-604)BV035915045 |
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