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µ¿µµ(¿ìÃø)¿Í ¼µµ(ÁÂÃø) µÎ °³ÀÇ ¼¶À¸·Î ÀÌ·ç¾îÁø µ¶µµÀÇ Àü°æ
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µ¿µµ¿¡¼ ¹Ù¶óº» ¼µµÀÇ ¸ð½À.
ÇϺÎÀÇ °¢·Â¾ÏÃþ À§¿¡ ¿ë¾Ï·ù°¡ ³ªÅ¸³ª°í °üÀÔ¾Ïüµµ °üÂûµÈ´Ù.
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¼µµÀÇ ´É¼± À§¿¡¼ ¹Ù¶óº» µ¿µµÀÇ ¸ð½À.
¿©·¯ °³ÀÇ ´ÜÃþµéÀÌ °üÂûµÇ¸ç ¼¶ÀÇ Á߾Ӻο¡´Â °ú°Å ºÐȱ¸·Î À߸ø ¾Ë·ÁÁ®¿Ô´ø"õÀå±¼"À̶õ À̸§ÀÇ ¿ì¹°°ú °°Àº ÁöÇüÀÌ °üÂûµÈ´Ù.
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µ¶µµÀÇ µ¿µµ¿¡´Â °æºñ´ë °Ç¹°ÀÌ ¿©·µ ÀÖ´Â ¹Ý¸é, ¼µµ¿¡´Â ¾î¹Î ¼÷¼Ò°¡ À¯ÀÏÇÑ
°Ç¹°ÀÌ´Ù.
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µ¶µµÀÇ ÁöÁúÁ¶»ç¸¦ À§ÇØ °í¹«º¸Æ®¸¦ ÀÌ¿ëÇØ µ¿µµ¿¡ »ó·úÇÏ°í ÀÖ´Â ¸ð½À.
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µ¶µµÀÇ µ¿µµ¿Í ¼µµ´Â ¼ö m ±íÀÌÀÇ Á¼Àº ¼ö·Î·Î ºÐ¸®µÇ¾î ÀÖÀ¸¸ç, ÀÌ°÷¿£ »ÏÁ·
ÇÑ ¾ÏÃʵéÀÌ ¿©·µ µ¹ÃâÇØ ÀÖ´Ù.
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µ¿µµÀÇ ÁöÃþÀº ¿©·¯ °³ÀÇ ´ÜÃþ¿¡ ÀÇÇØ Àß·Á ÀÖÀ¸¸ç, ´ÜÃþ¸éÀ» µû¶ó ¾à 250¸¸³â
ÀÇ ³ªÀ̸¦ °®´Â ¾Ï¸ÆµéÀÌ °üÀÔÇØ ÀÖ´Ù. ÇϺÎÀÇ È»ê¼â¼³¾Ï°ú »óºÎÀÇ Á¶¸é¾Ï »çÀÌ
ÀÇ °æ°è¸éÀÌ ´ÜÃþ À̵¿¿¡ ÀÇÇØ ³ôÀÌ°¡ µéÂß³¯ÂßÇÏ´Ù.
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µ¿µµÀÇ ÃÖÇϺο¡ ³ªÅ¸³ª´Â ÀÀȸÁú °¢·Â¾ÏÀÇ ¸ð½À. ¼öÀú ¼â¼³·ù(subaqueous
debris flow) ±â¿øÀÇ ÃþÀ¸·Î Çؼ®µÈ´Ù. ÀÌ °¢·Â¾Ï¿¡ Æ÷ÇÔµÈ Çö¹«¾Ï·ÂÀº ¾à 460¸¸
³âÀÇ ³ªÀ̸¦ °®´Â °ÍÀ¸·Î ÃøÁ¤µÇ¾ú´Ù.
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Á¦ÁÖµµ ¼Û¾Ç»ê¿¡¼ ¹Ù¶óº» »ê¹æ»êÀÇ ¸ð½À. DomeÀÇ ¸ð¾çÀ» Àß º¸¿©ÁÖ°í ÀÖ´Ù.
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Á¦ÁÖµµ ³²¼ºÎ ¹Ù´å°¡ÀÇ ÁÖ»óÀý¸® ¿ë¾ÏÀ» À§¿¡¼ ¹Ù¶óº» ¸ð½À. ÀϺΠÁö±¸°úÇÐ ±³Àç¿¡ º£°³¿ë¾ÏÀ¸·Î À߸ø ¼Ò°³µÇ¾î ÀÖÀ½. |
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Á¦ÁÖµµ ¼ö¿ùºÀ ÀÀȸȯ(tuff ring)¿¡¼ °üÂûµÇ´Â Ãþ»ó ÀÀȸ¾Ï(stratified tuff)°ú ź³¶(bedding sag) ±¸Á¶¸¦ ¸¸µé°í ÀÖ´Â °¢·ÂÀÇ È£Ãþ.
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Á¦ÁÖµµ ¼ö¿ùºÀ ÀÀȸȯ(tuff ring)¿¡¼ °üÂûµÇ´Â °Å´ë¿¬Èç(megaripple). ÆÄÀåÀº 2~3 m °¡·®. ȼ⳷ù(pyroclastic surge) ±â¿øÀÇ ÀÀȸ¾Ï¿¡
¼ Àß ³ªÅ¸³ª´Â ±¸Á¶ÀÌ´Ù.
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ÀÏÃâºÀÀÇ °¡Æĸ¥ »ç¸éÀ» µû¶ó ºÐÃâ µµÁß »çÅÂ(translational slide)°¡ ÀϾÀ¸¸ç, slide slabÀÌ »ç¸é ¾Æ·¡ÂÊ¿¡ °ãÃÄ ½×¿© Ãæ»ó´ÜÃþ(thrust)ÀÇ
imbricate stack°ú °°Àº ±¸Á¶¸¦ ¸¸µé¾ú´Ù. |
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¼º»ê ¹Ýµµ Çؾȿ¡¼ ¹Ù¶óº» ÀÏÃâºÀÀÇ ¸ð½À.
Çؾȼ±À» µû¶ó ³ªÅ¸³ª´Â ¾Ï¼®Àº ÀÏÃâºÀ ÀÀȸ±¸(tuff cone)ÀÇ À絿¿¡ ÀÇÇØ ¸¸µé¾îÁø Áß±â Ȧ·Î¼¼ÀÇ ½Å¾ç¸®Ãþ.
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ºñ¾çµµÀÇ ÇؾÈÀ» µû¶ó È»êźÀÌ ´Ù¼ö ³ªÅ¸³ª¸ç, ±× Áß¿¡´Â »çÁø°ú °°ÀÌ ±æÀÌ°¡
¼ö m¸¦ ³Ñ´Â °Íµéµµ ÀÖ´Ù. È»êźÀº Ç¥¸é¿¡ ºñÇØ Á߽ɺηΠ°¥ ¼ö·Ï ±â°øÀÇ Å©±â
¿Í ÇÔ¾çÀÌ Áõ°¡ÇÑ´Ù.
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ºñ¾çµµ Çؾȿ¡ ³ªÅ¸³ª´Â blisterÀÇ ´Ü¸é. ±¼¶Ò°ú °°ÀÌ ³»ºÎ°¡ ºñ¾î ÀÖ´Ù.
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Á¦ÁÖµµ ÇѸ²°ø¿ø ¾Õ¹Ù´ÙÀÇ ¼¶ÀÎ ºñ¾çµµ Çؾȿ¡´Â ¼ÓĪ "¾Ö±â¾÷Àº µ¹"À̶ó ºÒ¸®
´Â ±â¾ÏÀÌ ³ªÅ¸³ª´Âµ¥, ÀÌ µ¹Àº ¿ë¾Ï·ù ³»ºÎÀÇ °¡½º°¡ ºÐÃâÇÏ¿© ¸¸µé¾îÁø "¿ë¾Ï
±¼¶Ò"À¸·Î º¼ ¼ö ÀÖÀ¸¸ç ¿µ¾î·Î´Â blister¶ó°í ºÎ¸¥´Ù.
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Á¦ÁÖµµ ¼ºÎ»ê¾÷µµ·Î °ø»ç ÇöÀå¿¡¼ °üÂûµÇ´Â ºÐ¼®±¸(cinder cone or scoria
cone)ÀÇ ´Ü¸é. ¿À¸¥ÂÊÀ¸·Î °æ»çÁø Ãþ¸®°¡ °üÂûµÇ¸ç, ºÐ¼®±¸Ãþ À§¸¦ ¿ë¾ÏÀÌ µ¤°í
ÀÖ´Ù.
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Á¦ÁÖµµ Á¦µ¿¸ñÀå¿¡ ³ªÅ¸³ª´Â µ¼»óÀÇ Çö¹«¾Ïü. ¸¶±×¸¶°¡ ¾èÀº ÁöÇÏ¿¡¼ ±»¾î ¸¸
µé¾îÁø ¼Ò±Ô¸ðÀÇ cryptodomeÀ¸·Î Çؼ®µÈ´Ù. ¸¶±×¸¶°¡ ±Þ°ÝÈ÷ ³Ã°¢-¼öÃàµÇ¸ç ¸¸µé
¾îÁø °ÅºÏ µî²®Áú ¸ð¾çÀÇ Á¶Á÷ÀÌ Ç¥¸é¿¡¼ °üÂûµÈ´Ù.
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Á¦ÁÖµµ ¼Û¾Ç»ê ÀÀȸȯ(tuff ring)ÀÇ ÀÀȸÃþ¿¡¼ °üÂûµÇ´Â ź³¶(bedding sag). È
»ê±«ÀÇ ³«ÇÏ Ãæ°ÝÀ¸·Î ÀÎÇØ ÀÀȸ¾ÏÀÇ Ãþ¸®°¡ ¾Æ·¡ÂÊÀ¸·Î ³»·Á ¾É¾Ò´Ù.
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¼®È¸¾Ï Áö´ë¿¡¼´Â ¼®È¸µ¿±¼ÀÇ ºØ±«·Î ÀÎÇØ ±ò¶§±â ¸ð¾çÀ¸·Î ÇÔ¸ôµÈ ÁöÇü
(doline)ÀÌ ¸¸µé¾î Áö´Âµ¥, ¿ë¾Ï µ¿±¼ÀÌ ¸¹Àº Á¦ÁÖµµ¿¡¼´Â ¿ë¾Ï µ¿±¼ÀÇ ºØ±«·Î
ÀÎÇØ doline¿Í À¯»çÇÑ ÇÔ¸ô ÁöÇüÀÌ °÷°÷¿¡¼ °üÂûµÈ´Ù. »çÁøÀº ¿ù¶ûºÀ ±Ùó¿¡¼
ÃÔ¿µÇÑ ÇÔ¸ô ÁöÇü.
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Á¦ÁÖµµ ¼ö¿ùºÀ ÀÀȸȯÀÇ È±¸·û(crater rim) ±Ùó¿¡´Â ÀÀȸÃþÀÌ È±¸ÂÊÀ¸·Î ÇÔ¸ô
ÇÏ¸ç ¸¸µé¾îÁø ´ÜÃþµéÀÌ ¿©·µ °üÂûµÈ´Ù.
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Á¦ÁÖµµ ¼Û¾Ç»ê ÀÀȸȯÀÇ Çü¼º µµÁß ºÐÃâÀÇ ÈÞÁö±â°¡ ÀÖ¾úÀ¸¸ç, À̶§ ¸¸µé¾îÁø ħ
½Ä¸é À§·Î ÀÀȸÃþÀÌ ¶Ç´Ù½Ã ½×À̸ç U-ÀÚÇüÀÇ Çϵµ±¸Á¶(U-shaped channel
structure)°¡ ¸¸µé¾îÁ³´Ù.
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¸¶±×¸¶ÀÇ ¼öÁß ºÐÃâ·Î ¸¸µé¾îÁø ÀÏÃâºÀ¿¡´Â ¼¼¸³ÀÇ È»êȸ°¡ ÇǺ¹µÇ¾î ÀÖ´Â È»ê
·Â(armored lapilli)µéÀÌ ¸¹ÀÌ ³ªÅ¸³´Ù. ÀÌ´Â ºÐÃâÀÌ ¸Å¿ì ½ÀÇÑ(wet) Á¶°Ç¿¡¼
ÀϾ È»êºÐÃâ¹°µéÀÌ ¸Å¿ì ÃàÃàÇÏ¿´À½À» Áö½ÃÇÑ´Ù.
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Á¦ÁÖµµ »ï¸ÅºÀ ÇؾȰ¡¿¡ °íȵÇÁö ¾ÊÀº ÀÀȸÃþ ³»ºÎ·Î °üÀÔÇÑ ºÒ²É ¸ð¾çÀÇ ¾Ï¸Æ.
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Á¦ÁÖµµ »ï¸ÅºÀ ÇؾȰ¡ÀÇ ¾Ï¸Æ °¡ÀåÀÚ¸®¿¡´Â ¿ë¾ÏÆíµéÀÌ °¡Áöó·³ »¸¾î ÀÖÀ¸¸ç,
À̵éÀº ¸¶±×¸¶ °üÀÔ¿¡ ÀÇÇØ °¡¿µÈ ÀÀȸ¾Ï ³»ºÎÀÇ ¼öºÐÀÌ ±âü »óÅ·ΠºüÁ® ³ª°¡
¸ç Çü¼ºµÈ gas escape pipe·Î Çؼ®µÈ´Ù.
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µ¶µµÀÇ µ¿µµ¿Í ¼µµ´Â ¼ö m ±íÀÌÀÇ Á¼Àº ¼ö·Î·Î ºÐ¸®µÇ¾î ÀÖ´Ù.
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