Misc: Which member of the royal family was christened on Dec 21 1984?

Questions

Geology : The molten material from a volcano is ________?

Geology : The spot on the Earth's surface directly above an earthquake's focus is called the ______.?

Geology : The violet variety of quartz is called ________.?

Geology : There are three types of rocks: metamorphic, sedimentary, and _________.?

Geology : These limestone deposits rise from the floor of caves.?