Scoria cones, tseem hu ua cinder cones, tsim los ntawm tsub zuj zuj ntawm tephra thaum me me, monogenetic, tawg tawg ntawm bas altic magma (xws li Cas & Wright 1988).
Scoria cone tsim li cas?
Scoria cones yog tsim by Strombolian eruptions, uas tsim eruptive kab ntawm bas alt tephra feem ntau tsuas yog ob peb puas meters siab. Ntau scoria cones yog monogenetic nyob rau hauv uas lawv tsuas erupt ib zaug, nyob rau hauv sib piv rau tiv thaiv volcanoes thiab stratovolcanoes.
cinder cone volcanoes nyob qhov twg?
Cinder cones feem ntau pom ntawm cov flanks ntawm daim thaiv hluav taws kub, stratovolcanoes, thiab calderas. Piv txwv li, geologists tau txheeb xyuas ze li ntawm 100 cinder cones ntawm cov flanks ntawm Mauna Kea, ib lub roob hluav taws nyob rau ntawm Island of Hawai`i (cov cones no kuj hu ua scoria cones thiab cinder thiab spatter cones).
Ntau npaum li cas cinder cones tawg?
Cov roob hluav taws no tsis tshua muaj siab tshaj 500 m hauv qhov siab thiab tsim qhov siab ntawm 30 txog 40º nrog qhov dav dav dav. Thaum hom hluav taws kub no dhau los ua dormant, lub khob cij cinder ib txwm tsis tshwm sim dua. Feem ntau ntawm lawv yog "sib tua ib leeg" eruptive nta.
Dab tsi ua rau asymmetry hauv roob hluav taws?
Cinder cones tseem tuaj yeem sib txawv tsis sib xws yog tias muaj cua tsis tu ncua thaum lub sijhawm tawg thiab/los yog lawv tsim ntawm lub taub hau ntawm cov lava loj ntws. … Ib tug Mauna Kea cindercone saib los ntawm huab cua. Lub lava ntws (dawb daim duab) tau tawm ntawm lub hauv paus ntawm lub khob hliav qab, muab lub khob hliav qab rau daim ntawv asymmetric.
