منابع مشابه
The Toba Caldera Complex
The Toba Caldera in Indonesia is one of the most remarkable volcanic features formed during Quaternary geologic time. Its rich history of research for over a century has yielded important information on the physical volcanology of silicic calderas and super-eruptions, geochemical evolution of silicic magma bodies, and geophysical imaging of active sub-volcanic systems. During the past 1.3 my, t...
متن کاملPost-supereruption recovery at Toba Caldera
Large calderas, or supervolcanoes, are sites of the most catastrophic and hazardous events on Earth, yet the temporal details of post-supereruption activity, or resurgence, remain largely unknown, limiting our ability to understand how supervolcanoes work and address their hazards. Toba Caldera, Indonesia, caused the greatest volcanic catastrophe of the last 100 kyr, climactically erupting ∼74 ...
متن کاملLactational amenorrhoea in well-nourished Toba women of Formosa, Argentina.
The proximate causes of the contraceptive effect of lactation are still a matter of productive debate. This study sought to disentangle the relative impact that intense breast-feeding practices and maternal nutrition have on the regulation of ovarian function in nursing women. A mixed-longitudinal, direct-observational, prospective study was conducted of the return to postpartum fecundity in 11...
متن کاملVolcanology. A large magmatic sill complex beneath the Toba caldera.
An understanding of the formation of large magmatic reservoirs is a key issue for the evaluation of possible strong volcanic eruptions in the future. We estimated the size and level of maturity of one of the largest volcanic reservoirs, based on radial seismic anisotropy. We used ambient-noise seismic tomography below the Toba caldera (in northern Sumatra) to observe the anisotropy that we inte...
متن کاملToba supereruption: age and impact on East African ecosystems.
Lane et al. (1) recovered microscopic glass shards (cryptotephra) from a thin layer of sediment deposited in Lake Malawi and chemically characterized them as volcanic ash (Youngest Toba Tuff, YTT) from the Toba “supereruption” in Sumatra. The authors found no evidence of significant climate change at multidecadal to millennial timescales in the sedimentary record, and in their report conclude t...
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ژورنال
عنوان ژورنال: Science
سال: 2012
ISSN: 0036-8075,1095-9203
DOI: 10.1126/science.338.6111.1128-a