Question 1
Which type of basaltic lava flow has its surface covered with sharp-edged, angular blocks and rubble?
◦ pillow lava
◦ aa
◦ pahoehoe
◦ scoria
Question 2
Which one of the following statements concerning volcanic blocks and bombs is true?
◦ Orange represents the cooler parts, which are below the surface.
◦ The surface cools faster than the lava below, and is black in appearance.
◦ The black part is aa, while the orange is pahoehoe.
◦ The top of the lava flow cools slower than the middle of the lava flow.