* تفرا* انفجار بركاني* بركان طبقي* بركان تصدعي== مراجع ==* USGS definition of Aā* USGS definition of Pâhoehoe* USGS definition of Ropy Pāhoehoe* Volcanic landforms of Hawaii* USGS hazards associated with lava flows* Hawaiian Volcano Observatory Volcano Watch newsletter article on Nyiragongo eruptions, 31 January 2002* National Geographic lava video Retrieved 23 August 2007
==Gallery====References====External links==* USGS definition of Aā* USGS definition of Pāhoehoe* USGS definition of Ropy Pāhoehoe* Volcanic landforms of Hawaii* USGS hazards associated with lava flows* Hawaiian Volcano Observatory Volcano Watch newsletter article on Nyiragongo eruptions, 31 January 2002* National Geographic lava video Retrieved 23 August 2007