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Macintosh Picture Format  |  1997-01-23  |  310KB  |  640x480  |  8-bit (237 colors)
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OCR: CRATER Bhis funne shapec opening at the top FFOM TOF volcano onablos mxture lava ash. steam and and blown intc the air along with hard bieces ava callec bombs YENT SIDE VENT Under vent may pressure branch The or from the chimney off from the main vent tma chamber carry allowing magma Lava through cracks rock FISSURE ERUPTION T Some will orce its way upwards through vertical cracks ock CONE The cone cons of layers of ash pue lava rom SJLL Not all magma finds MAGMA CHAMBER way to the surface Molten magma ravels up ward from the m antie cool Some be will twe en ga ther layers and of collecting in large pocke 18 in the crust whe un dergr rounc rock mixe with as es and Water. Under pr e sure from heat in the mantle the magma IS forced up the vent and to the surtace This biown erupt pieces CENTR ...