Longgang VulkanLonggang volcano is a field of more than 150 cinder cones, lava flows and 8 maars located in Jilin Province of NE China, west of Changbaishan volcano. It covers an area of 1700 sq km.
A large (VEI4-5) eruption occurred around 350 AD from the large Jinlongdingzi ("Mountain of the Golden Dragon") cone and deposited basaltic pumice and scoria over a broad area to the east. Jinlongdingzi is the only known vent that has erupted in the past 10,000 years.
The composition of the lavas of Longgang is basaltic and trachybasaltic.