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Toluca Deposit

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Series: GSA Special Papers
Published: 01 January 2006
DOI: 10.1130/2006.2402(07)
... Approximately 21,700 yr B.P., after a period of quiescence of ∼4800 yr, Nevado de Toluca volcano erupted, producing the Lower Toluca Pumice deposit. The activity generated a 24-km-high Plinian column that lasted ∼11–13 h and dispersed 2.3 km 3 (0.8 km 3 dense rock equivalent) of tephra toward...
Journal Article
Journal: GSA Bulletin
Published: 01 February 2003
GSA Bulletin (2003) 115 (2): 230-248.
...J.L. Arce; J.L. Macías; L. Vázquez-Selem Abstract During the late Pleistocene, a large Plinian eruption from Nevado de Toluca volcano produced a complex sequence of pyroclastic deposits known as the Upper Toluca Pumice. This eruption began with a phreatomagmatic phase that emplaced a hot...
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Series: GSA Special Papers
Published: 01 January 2006
DOI: 10.1130/2004.VHITMC.SP402
... corresponds to the Upper Toluca Pumice at Nevado de Toluca volcano, described by Bloomfield and Valastro (1974 , 1977 ) and Arce et al. (2003) (see also Days 7 and 8, this guide). Both pumice deposits were produced by violent Plinian eruptions. The Tutti Frutti Pumice is stratigraphically older...
... day. During the eighth day, we will visit pyroclastic deposits exposed at the northeastern and eastern flanks of Nevado de Toluca. These proximal to medial facies outcrops comprise mostly units produced by major Plinian, dome-destruction, and minor sector-collapse events. The Plinian events occurred...
FIGURES | View All (59)
Series: Penrose Field Guide
Published: 01 January 2004
DOI: 10.1130/2004.VHITMC.PFG
EISBN: 9780813759470
Journal Article
Journal: GSA Bulletin
Published: 01 June 1974
GSA Bulletin (1974) 85 (6): 901-906.
... B.P., which deposited thick, cold, lithic lahars around its flanks. After a period of widespread soil formation, dated at 24,500 yr B.P., a relatively minor Vesuvian-type eruption produced small amounts of pumice that fell only on the eastern and northeastern slopes of the volcano. A major Plinian...
Journal Article
Journal: Geosphere
Published: 01 October 2008
Geosphere (2008) 4 (5): 854-871.
... major plinian eruption of the volcano, dated as 10.5 ka ( Bloomfield and Valastro, 1974 ; Bloomfield and Valastro, 1977 ; Macías et al., 1997 ; Arce et al., 2003 ), produced a fall deposit, the Upper Toluca Pumice, which covers nearly the entire Nevado de Toluca edifice and vicinity. This deposit...
FIGURES | View All (17)
Image
(A) Regional isopachs for thickness of fall <b>deposit</b> of the Upper <b>Toluca</b> Pum...
in > Geosphere
Published: 01 October 2008
Figure 2. (A) Regional isopachs for thickness of fall deposit of the Upper Toluca Pumice (UTP) (modified from Arce et al., 2003 ). SA—San Antonio Volcano. (B) Schematic geological map of the Nevado de Toluca (NdT) Volcano. (C) Schematic geological cross section of Nevado de Toluca Volcano.
Journal Article
Published: 01 December 2005
Clays and Clay Minerals (2005) 53 (6): 613-621.
... was adjusted to 60 mmoles of Fe/g of clay. It was observed that higher values of this ratio led to worse acidity and textural characteristics, a consequence of the probable formation of Fe oxides that could not only deposit on the surface but also block the pores formed during the pillaring process. Likewise...
FIGURES | View All (4)
Series: GSA Special Papers
Published: 01 January 2007
DOI: 10.1130/2007.2422(06)
... rhyolitic ignimbrites, and Miocene andesitic lava flows ( García-Palomo et al., 2002 ) (Fig. 6) . Figure 5. LANDSAT image showing Nevado de Toluca and the maximum extent of Pilcaya debris flow and the Mogote lahar deposits ( Capra and Macías, 2002 ). Figure 6 ( legend on following page...
Journal Article
Published: 01 October 2004
Clays and Clay Minerals (2004) 52 (5): 650-656.
... fuel and subsequent generation of electricity result in the formation of a substantial amount of radioactive waste, the safe treatment and disposal of which are complex problems. Radioactive wastes were originally immobilized and sealed in barrels and then deposited in sea water. Some are actually...
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Series: Geological Society, London, Special Publications
Published: 01 January 2017
DOI: 10.1144/SP442.37
EISBN: 9781786202925
... of the Instituto Geológico de México , presented a long lecture entitled, ‘The Geographical and Geological Distribution of the Mineral Deposits of Mexico’ . He informed his audience that: ‘hydrocarbons occur in formations ranging from the Upper Cretaceous to the Pliocene, along the coast of the Gulf of Mexico...
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TABLE 2. RADIOCARBON DATES OBTAINED BELOW, ABOVE, AND WITHIN UPPER <b>TOLUCA</b> P...
Published: 01 February 2003
TABLE 2. RADIOCARBON DATES OBTAINED BELOW, ABOVE, AND WITHIN UPPER TOLUCA PUMICE DEPOSIT, AS WELL AS FROM WHITE PUMICE FLOW DEPOSIT OF NEVADO DE TOLUCA VOLCANO
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Figure 6. Frequency and composition histograms of the Upper <b>Toluca</b> Pumice d...
Published: 01 February 2003
Figure 6. Frequency and composition histograms of the Upper Toluca Pumice deposit sampled at section 212, located 4 km from the volcano (location in Fig. 4 ). Clear vertical variations of the median diameter (Md ϕ ) and sorting (σ ϕ ) are observed among pyroclastic fall deposits. Notice
Image
Figure 1. A: Map of Nevado de <b>Toluca</b>, Mexico, showing extent of pyroclastic...
in > Geology
Published: 01 March 2006
Figure 1. A: Map of Nevado de Toluca, Mexico, showing extent of pyroclastic density current deposits (unit F 1 of the Upper Toluca Pumice). Black area shows massive deposits (>2 m), dotted line delimits stratified deposits (>2 m), and dashed line shows maximum extent of F 1 . Thick line
Image
Figure 15. Photograph of the white pumice flow (WPF) and Upper <b>Toluca</b> Pumic...
Published: 01 February 2003
Figure 15. Photograph of the white pumice flow (WPF) and Upper Toluca Pumice sequence (unit abbreviations explained in Fig. 2 ) relationship at site 161. Notice the paleosol that is dividing the sequences. Scale is the 60-cm-long shovel. BAF—block-and-ash-flow deposit
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Figure 16. Correlation of Upper <b>Toluca</b> Pumice at proximal, medial, and dist...
Published: 01 February 2003
Figure 16. Correlation of Upper Toluca Pumice at proximal, medial, and distal locations where 14 C ages have been obtained. UTP—Upper Toluca Pumice; WPF—white pumice flow; BAF—pink block-and-ash-flow deposit
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Figure 4. Topographic map of Nevado de <b>Toluca</b> showing the location of selec...
Published: 01 February 2003
Figure 4. Topographic map of Nevado de Toluca showing the location of selected stratigraphic sites mentioned in the text. Contour interval is 100 m. The dotted pattern represents the distribution of the pyroclastic flow deposits (F0, F1, F2, and F3). The black dots in the inset map represent
Journal Article
Journal: Geology
Published: 01 March 2006
Geology (2006) 34 (3): 157-160.
...Figure 1. A: Map of Nevado de Toluca, Mexico, showing extent of pyroclastic density current deposits (unit F 1 of the Upper Toluca Pumice). Black area shows massive deposits (>2 m), dotted line delimits stratified deposits (>2 m), and dashed line shows maximum extent of F 1 . Thick line...
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Series: DNAG, Geology of North America
Published: 01 January 1991
DOI: 10.1130/DNAG-GNA-P3.373
EISBN: 9780813754703
... of the deposit have continued without interruption. Tizapa lies 67 km directly 60° southwest of Toluca and 4 km southeast of Zacazonapan in southwestern Mexico State (Fig. 1). Highway 130 from Toluca leads to Temascaltepec, from where unpaved roadways reach Zacazonapan. Fieldwork included a semidetailed...