LAVA MOVEMENT AT PARÍCUTIN VOLCANO, MEXICO
1948; Geological Society of America; Volume: 59; Issue: 12 Linguagem: Inglês
10.1130/0016-7606(1948)59[1267
ISSN1943-2674
Autores Tópico(s)Geology and Paleoclimatology Research
ResumoResearch Article| December 01, 1948 LAVA MOVEMENT AT PARÍCUTIN VOLCANO, MEXICO KONRAD B KRAUSKOPF KONRAD B KRAUSKOPF U. S. GEOLOGICAL SURVEY, WASHINGTON 25, D. C. Search for other works by this author on: GSW Google Scholar Author and Article Information KONRAD B KRAUSKOPF U. S. GEOLOGICAL SURVEY, WASHINGTON 25, D. C. Publisher: Geological Society of America Received: 11 Sep 1947 First Online: 02 Mar 2017 Online ISSN: 1943-2674 Print ISSN: 0016-7606 Copyright © 1948, The Geological Society of America, Inc. Copyright is not claimed on any material prepared by U.S. government employees within the scope of their employment. GSA Bulletin (1948) 59 (12): 1267–1284. https://doi.org/10.1130/0016-7606(1948)59[1267:LMAPVM]2.0.CO;2 Article history Received: 11 Sep 1947 First Online: 02 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Permissions Search Site Citation KONRAD B KRAUSKOPF; LAVA MOVEMENT AT PARÍCUTIN VOLCANO, MEXICO. GSA Bulletin 1948;; 59 (12): 1267–1284. doi: https://doi.org/10.1130/0016-7606(1948)59[1267:LMAPVM]2.0.CO;2 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyGSA Bulletin Search Advanced Search Abstract The lava flows of Parícutin Volcano, Mexico, offer an exceptional opportunity to study details of lava movement, because many flows are accessible throughout their length and can be watched from their birth to the cessation of their movement. Petrographically the lavas show no significant difference from one flow to another or in different parts of the same flow. The maximum lava temperature observed was 1070°C.; the maximum estimated rate of flow was 60 meters per minute; the viscosity is probably on the order of 105 to 106 poises. The flows start in fissure zones cutting older Parícutin lavas near the southwest base of the volcano. Within a short distance of its orifice a flow is covered with cooled blocks which are broken and slightly abraded as they are carried downstream. Differential movement in a flow takes place principally at its edges, where a reddish breccia and grooved and slickensided surfaces form. Like a glacier, a lava flow develops transverse crescentic ridges and lateral moraines. At its front movement is normally effected by the rolling forward of molten lava within, which carries down cooled blocks from the surface and piles them up ahead of the flow. As a flow dies the lava level lowers in the channel, and small side tongues break through the moraines. Some Parícutin lavas move considerable distances beneath older lava. The longest flow, which covered the town of San Juan in 1944, has a surface of rough curved slabs very different from the blocky surface of other flows but similar to the surface structures developed near lava orifices and by movement of viscous lava through fissures.The complexities of this small lava field, produced simply by the movement of successive flows, would be difficult to interpret if found in older rocks. This content is PDF only. Please click on the PDF icon to access. First Page Preview Close Modal You do not have access to this content, please speak to your institutional administrator if you feel you should have access.
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