Igneous intrusions are a type of rock ... the softer surrounding land and some of the outer layers of the extremely hard rock volcanic plug. That sculpted the rock, giving it the shape we can ...

Igneous rock is formed by the cooling of molten rock ... As rocks at the earth's surface are broken down, or “weathered,” the sediment is moved by forces such as water and wind and deposited elsewhere ...

Igneous rocks form from the solidification of molten ... involves mineral-rich water seeping into the rhyolitic ash layers. As this water circulates through the volcanic material, it carries ...