Assertion: shield volcano | /r/Synonym | laoheidingzi
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Source sentences:
text: It contains a 5-km-wide, 850-m-deep summit caldera occupied by scenic Lake Tianchi ("Sky Lake").The volcano has a diameter of 60 km and is composed dominantly of trachytic and rhyolitic lavas, overlying an older shield volcano known as the Changbaishan or Laoheidingzi shield volcano.