0 a type of black rock that comes from a volcano --
1 a type of black rock that comes from a volcano (= mountain that explodes and throws out hot rocks) --
Plucking may effectively erode the welljointed thick basalt bed, resulting in boulders the size of which depends on the bedding and joints of the basalts.
These two tuffs could have had the same parental magmas than the other tuffs and associated basalts.
Unweathered basalt minerals such as olivine and pyroxene contain high amounts of reduced iron that microbes can scavenge.
The breccia contains a variety of boulders, dominated by vesicular basalt and phonolitic lavas.
The levels of elephant utilization and tree pushing were also determined for the four main geological substrates, basalt, granite, rhyolite and gabbros.
The rapid incision can be attributed to the adequacy of discharge under the prevailing warm and humid climate conditions after basalt extrusion.
The basalts have distinctive petrographic characteristics such as rounded and skeletal olivine phenocrysts with abundant melt inclusions, implying the mixing of two distinct magmas.
Mineral beads were added in order to reveal a possible influence of basalt and limonite on the molecular stability and formation of the derivatives.
