Sea- Floor Spreading molten material erupts through the valley that runs along the center of some mid-ocean ridges. This material hardens to form the rock of the ocean floor. Mid-ocean ridges an undersea mountain chain where new ocean floor is produced.
Magma pushed up from the mantle hardens to form new rock at mid-ocean ridges.
tectonic plates
Columnar basalt.
magma
Lava that cuts across rock layers hardens to form a disk.
Lava that cuts across rock layers hardens to form a feature called a Dike.
igneous rock
Plutonic (or intrusive) rock forms when melted rock from inside the earth cools and hardens. The larger it cools down there, the bigger its crystals will be.
Igneous Rock is formed when magma cools and hardens. It depends on whether it cools above ground or under ground for the size of the mineral crystals forming inside it.
Lava that cuts across rock layers hardens to form a disk.
Igneous rock is what forms when magma cools and hardens.
Igneous
lava rock
igneous rock.
Extrusive igneous rock.
rock is melted to form molten rock, then as the lava hardens, it forms any type of igneous rock
Lava that cuts across rock layers hardens to form a feature called a Dike.
Igneous rock.
Extrusive igneous rock.
intrusive rock froms when magma cools or hardens underneath the earth. :)
igneus rock