東華大學圖書館 |

Language: English

Help

回圖書館首頁

手機版館藏查詢

Back

Switch To: Labeled | MARC Mode | ISBD

Basaltic 'a'a¯ Lava Field Emplacemen...

Younger, Zachary Paul.

Linked to FindBook

Google Book

Amazon

博客來

Basaltic 'a'a¯ Lava Field Emplacement of the Intraplate Marcath Volcano (Central Nevada) from Field and LiDAR Data.

Record Type:	Electronic resources : Monograph/item
Title/Author:	Basaltic 'a'a¯ Lava Field Emplacement of the Intraplate Marcath Volcano (Central Nevada) from Field and LiDAR Data./
Author:	Younger, Zachary Paul.
Published:	Ann Arbor : ProQuest Dissertations & Theses, : 2018,
Description:	134 p.
Notes:	Source: Masters Abstracts International, Volume: 79-12.
Contained By:	Masters Abstracts International79-12.
Subject:	Geology. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=10822127
ISBN:	9780438048379

Basaltic 'a'a¯ Lava Field Emplacement of the Intraplate Marcath Volcano (Central Nevada) from Field and LiDAR Data.
Younger, Zachary Paul.

Basaltic 'a'a¯ Lava Field Emplacement of the Intraplate Marcath Volcano (Central Nevada) from Field and LiDAR Data. - Ann Arbor : ProQuest Dissertations & Theses, 2018 - 134 p.

Source: Masters Abstracts International, Volume: 79-12.

Thesis (M.S.)--State University of New York at Buffalo, 2018.

This item must not be sold to any third party vendors.

Many aspects of basaltic ?a?? lava emplacement remain poorly understood, particularly those related to intraplate, monogenetic volcanoes. Using field and high-resolution LiDAR data, lava emplacement of the monogenetic intraplate Marcath volcano (central Nevada) was investigated in terms of surface morphology, rafted cone fragments, and lava parameters. Upon exiting the source crater, lavas are inferred to have initially ponded in an upland saddle between Marcath and an older cone before breaking out to feed three distinct lava lobes that spread out onto a flat valley floor below. As the lobes neared their final extent, pulses in lava flux compressed and brecciated the crust and formed wide arcuate ridges. Levees disappeared with increased distance from the vent and as the flows transitioned from channelized flow to laterally spreading flow. Distributions of over a thousand mapped rafts show that the early stages of the eruption likely produced much of the total raft volume and that rafts were typically deposited as a function of crustal cooling. The missing western sector of the Marcath cone is largely preserved as rafts and the rate of rafting likely kept pace with cone building over the eruption's duration such that once the cone was breached on one side, it did not heal. Rafts are found to have had an important impact on lava emplacement in certain locations, producing channels, canoes, and even instigating several bifurcations in flow lobes. Investigation into lava parameters yielded a total volume of 6.1 x 107 meters cubed, volumetric effusion rates of tens to hundreds of meters cubed per second, emplacement durations of days to weeks, and lava viscosities on the order of 106 to 10 7 Pa s. Compared to other documented lavas associated with monogenetic volcanoes, Marcath had a high lava effusion rate, low lava volume, low emplacement duration, and a short maximum flow length.

ISBN: 9780438048379Subjects--Topical Terms:

516570
Geology.

Basaltic 'a'a¯ Lava Field Emplacement of the Intraplate Marcath Volcano (Central Nevada) from Field and LiDAR Data.
LDR:03037nmm a2200337 4500 001 2265408
005 20200514112350.5
008 220629s2018 ||||||||||||||||| ||eng d
020 $a 9780438048379
035 $a (MiAaPQ)AAI10822127
035 $a (MiAaPQ)buffalo:15717
035 $a AAI10822127
040 $a MiAaPQ $c MiAaPQ
100 1 $a Younger, Zachary Paul. $3 3542566
245 1 0 $a Basaltic 'a'a¯ Lava Field Emplacement of the Intraplate Marcath Volcano (Central Nevada) from Field and LiDAR Data.
260 1 $a Ann Arbor : $b ProQuest Dissertations & Theses, $c 2018
300 $a 134 p.
500 $a Source: Masters Abstracts International, Volume: 79-12.
500 $a Publisher info.: Dissertation/Thesis.
500 $a Advisor: Valentine, Gregory A.
502 $a Thesis (M.S.)--State University of New York at Buffalo, 2018.
506 $a This item must not be sold to any third party vendors.
520 $a Many aspects of basaltic ?a?? lava emplacement remain poorly understood, particularly those related to intraplate, monogenetic volcanoes. Using field and high-resolution LiDAR data, lava emplacement of the monogenetic intraplate Marcath volcano (central Nevada) was investigated in terms of surface morphology, rafted cone fragments, and lava parameters. Upon exiting the source crater, lavas are inferred to have initially ponded in an upland saddle between Marcath and an older cone before breaking out to feed three distinct lava lobes that spread out onto a flat valley floor below. As the lobes neared their final extent, pulses in lava flux compressed and brecciated the crust and formed wide arcuate ridges. Levees disappeared with increased distance from the vent and as the flows transitioned from channelized flow to laterally spreading flow. Distributions of over a thousand mapped rafts show that the early stages of the eruption likely produced much of the total raft volume and that rafts were typically deposited as a function of crustal cooling. The missing western sector of the Marcath cone is largely preserved as rafts and the rate of rafting likely kept pace with cone building over the eruption's duration such that once the cone was breached on one side, it did not heal. Rafts are found to have had an important impact on lava emplacement in certain locations, producing channels, canoes, and even instigating several bifurcations in flow lobes. Investigation into lava parameters yielded a total volume of 6.1 x 107 meters cubed, volumetric effusion rates of tens to hundreds of meters cubed per second, emplacement durations of days to weeks, and lava viscosities on the order of 106 to 10 7 Pa s. Compared to other documented lavas associated with monogenetic volcanoes, Marcath had a high lava effusion rate, low lava volume, low emplacement duration, and a short maximum flow length.
590 $a School code: 0656.
650 4 $a Geology. $3 516570
650 4 $a Geophysics. $3 535228
650 4 $a Remote sensing. $3 535394
690 $a 0372
690 $a 0373
690 $a 0799
710 2 $a State University of New York at Buffalo. $b Geology. $3 3276846
773 0 $t Masters Abstracts International $g 79-12.
790 $a 0656
791 $a M.S.
792 $a 2018
793 $a English
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=10822127