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Two major
voluminous deposits (Jamapa avalanche and Teteltzingo lahar) are related to
collapses of ancestral volcanoes ( Torrecillas, the oldest and Espolón de
Oro, the intermediate volcano) above of which the present Citlaltépetl cone
grew. A comparatively small-scale debris avalanche deposit located about 20
km southeast of the volcano crops out along the Metlac river-valley, which is
behind the Citlaltépetl edifice.
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