Lava that is characterized by rough and jagged with sharp edges is Aa lava.
The Hawaiian word "a'" (pronounced "ah-ah") is used to describe lava flows that have a surface made up of fractured lava blocks known as clinkers. Walking on a hardened "A" flow is very sluggish and difficult due to the surface's severe spikyness.
Basaltic lava is made up of aa lava, which is made up of loose, jagged, and sharp shards. As the flow sweeps across the landscape, they are tossed around and carried along its top.
Wavy and fluid Pahoehoe's surface has a tangled rope-like appearance. It advances by ejecting molten lava toes from beneath a thin, pliable crust. Pahoehoe lava frequently changes into the blocky flows known as aa as it advances. Aa lava is composed of "clinkers," which are fragments of fractured lava, and has a rough, brittle surface.
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