Which type of basaltic lava flow has its surface covered with sharp- edged, angular blocks and rubble?

Question

Quizplus · Accepted Answer

Aa lava flows have a rough and rubbly surface, with sharp-edged, angular blocks and rubble, due to the lava breaking up into pieces as it moves forward. Scoria is a type of lava that contains abundant air-filled holes, pillow lava is rounded, bulbous shapes formed underwater or below the surface, and pahoehoe lava has a ropey or smooth surface texture. None of these are characterized by a surface covered in sharp-edged, angular blocks and rubble.

Which Type of Basaltic Lava Flow Has Its Surface Covered