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Toba Caldera

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Journal Article
Journal: Geology
Published: 01 November 1989
Geology (1989) 17 (11): 1040–1043.
...V. L. Sharpton; B. C. Schuraytz Abstract Reports of shock-deformed phenocrysts from the Toba ignimbrite deposits, Sumatra, have prompted considerable debate over whether shock-deformation products are clear evidence of a meteorite impact origin for the Cretaceous/Tertiary (K/T) boundary deposits...
Journal Article
Journal: Geology
Published: 01 January 1987
Geology (1987) 15 (1): 90.
Journal Article
Journal: Geology
Published: 01 January 1987
Geology (1987) 15 (1): 91–92.
Journal Article
Journal: Geology
Published: 01 May 1986
Geology (1986) 14 (5): 380–383.
...Neville L. Carter; Charles B. Officer; Craig A. Chesner; William I. Rose Abstract Plagioclase and biotite phenocrysts in ignimbrites erupted from the Toba caldera, Sumatra, show microstructures and textures indicative of shock stress levels higher than 10 GPa. Strong dynamic deformation has...
Journal Article
Journal: Geology
Published: 01 March 1991
Geology (1991) 19 (3): 200–203.
... in Malaysia were dated at 68 ±7 ka by the isothermal plateau fission-track technique. These new determinations, in conjunction with previous ages for the two oldest tuffs at Toba, establish the chronology of four eruptive events from the Toba caldera complex over the past 1.2 m.y. Ash-flow tuffs were erupted...
Image
Sample locations shown on a DEM of <span class="search-highlight">Toba</span> <span class="search-highlight">caldera</span> (Sumatra, Indonesia). Rhyol...
Published: 01 February 2020
Figure 1. Sample locations shown on a DEM of Toba caldera (Sumatra, Indonesia). Rhyolite dome exposures outside the study area (inset) were discovered in 2015 by Chesner et al. (2020) . (Color online.)
Image
Vertical seismic sections for three subduction zones.  A : <span class="search-highlight">Toba</span> <span class="search-highlight">caldera</span>, Su...
Published: 01 December 2012
Fig. 11. Vertical seismic sections for three subduction zones. A : Toba caldera, Sumatra; B : Mount Merapi, Central Java; C : across Central Andes, at 23° S. Projections of earthquakes are shown as asterisks in A and B and as black dots in C . Arrows show possible migration paths
Journal Article
Published: 01 December 2012
Russ. Geol. Geophys. (2012) 53 (12): 1253–1275.
...Fig. 11. Vertical seismic sections for three subduction zones. A : Toba caldera, Sumatra; B : Mount Merapi, Central Java; C : across Central Andes, at 23° S. Projections of earthquakes are shown as asterisks in A and B and as black dots in C . Arrows show possible migration paths...
FIGURES | View All (21)
Image
Sites where <span class="search-highlight">Toba</span> tephra occurs across peninsular India. Open circles show s...
Published: 17 December 2021
Fig. 1. Sites where Toba tephra occurs across peninsular India. Open circles show sites where tephra has been described and assigned to a source in the Toba caldera, Sumatra. Filled circles show localities where tephra was analysed in Pearce et al. (2020) and shown to be from the Youngest
Image
Products of large explosive eruptions: ( A ) giant eruption cloud approxima...
Published: 01 February 2008
of Lake Toba caldera, Sumatra, with 300 m high flat-topped cliffs in the background, which represent the caldera rim capped by landscape-burying ignimbrite deposits produced by a supereruption 74,000 years ago; for comparison, the area of Toba caldera is 3000 km 2 ( photo by S. B lake ).
Image
Products of large explosive eruptions: ( A ) giant eruption cloud approxima...
Published: 01 February 2008
of Lake Toba caldera, Sumatra, with 300 m high flat-topped cliffs in the background, which represent the caldera rim capped by landscape-burying ignimbrite deposits produced by a supereruption 74,000 years ago; for comparison, the area of Toba caldera is 3000 km 2 ( photo by S. B lake ).
Image
Products of large explosive eruptions: ( A ) giant eruption cloud approxima...
Published: 01 February 2008
of Lake Toba caldera, Sumatra, with 300 m high flat-topped cliffs in the background, which represent the caldera rim capped by landscape-burying ignimbrite deposits produced by a supereruption 74,000 years ago; for comparison, the area of Toba caldera is 3000 km 2 ( photo by S. B lake ).
Image
Products of large explosive eruptions: ( A ) giant eruption cloud approxima...
Published: 01 February 2008
of Lake Toba caldera, Sumatra, with 300 m high flat-topped cliffs in the background, which represent the caldera rim capped by landscape-burying ignimbrite deposits produced by a supereruption 74,000 years ago; for comparison, the area of Toba caldera is 3000 km 2 ( photo by S. B lake ).
Image
Likely extent of ash cloud (thick dashed line) and of pyroclastic flows (in...
Published: 01 February 2008
FIGURE 2 Likely extent of ash cloud (thick dashed line) and of pyroclastic flows (inset Landsat image; thin dashed line) produced during the 74 ka supereruption from the Toba caldera, Sumatra. Lake Toba (visible in center of inset) fills the 100 km long by 40 km wide depression formed during
Image
Figure 5. Percentage of major elements (on volatile-free basis) determined ...
Published: 01 March 2000
strong similarity between FeO (B) and K 2 O (D) values of our ash particles and values for Toba caldera.
Journal Article
Journal: Geology
Published: 01 November 2000
Geology (2000) 28 (11): 1055–1056.
... isotopic events in standard SPECMAP chronology ( Chiu et al., 2000 ). It is well known that there are three major rhyolitic co-ignimbrite eruptions of late Quaternary age in the Toba caldera. The 40 Ar/ 39 Ar age of the Oldest Toba Tuff is 0.84 ±0.03 Ma, that of the Middle Toba Tuff is 0.501 ±0.005 Ma...
FIGURES
Journal Article
Journal: Geology
Published: 01 March 2000
Geology (2000) 28 (3): 275–278.
... strong similarity between FeO (B) and K 2 O (D) values of our ash particles and values for Toba caldera. ...
FIGURES | View All (5)
Journal Article
Published: 17 December 2021
Journal of the Geological Society (2022) 179 (3): jgs2021-120.
...Fig. 1. Sites where Toba tephra occurs across peninsular India. Open circles show sites where tephra has been described and assigned to a source in the Toba caldera, Sumatra. Filled circles show localities where tephra was analysed in Pearce et al. (2020) and shown to be from the Youngest...
FIGURES | View All (5)
Journal Article
Journal: Geology
Published: 01 January 2004
Geology (2004) 32 (1): 61–64.
...Meng-Yang Lee; Chang-Hwa Chen; Kuo-Yen Wei; Yoshiyuki Iizuka; Steven Carey Abstract Little has been known about the earliest Toba eruptive episodes that created the largest-known caldera complex of Quaternary age. Here we report evidence for the eastward dispersal of the oldest Toba tuff in South...
FIGURES
Journal Article
Published: 01 February 2020
American Mineralogist (2020) 105 (2): 194–226.
...Figure 1. Sample locations shown on a DEM of Toba caldera (Sumatra, Indonesia). Rhyolite dome exposures outside the study area (inset) were discovered in 2015 by Chesner et al. (2020) . (Color online.) ...
FIGURES | View All (18)