Lava
Scratches - John Seach
Lava scratches
are parallel marks on lava produced by two flows sliding against each other.
The scratches
indicate the direction of flow.
Grooved Lava
Grooved lava
is produced by lava moving past another lava flow of rock.
Grooves are
deeper than scratches.
Lava Groove
www.volcanolive.com
Copyright John Seach