By Capt. Paul (Eclogite) on Saturday, July 14, 2007 - 11:00 pm:
It really depends on where your at as to how it's pronounced. I have always pronounced it "ba-salt". However in other parts of the world, especially England, it's "bay-salt" and in Australia it's "bass-alt". It's all the same rock, just pronounced a little different depending on where your at. It also lets people know where your from when you pronounce it.
It is indeed the Giant's Causeway in Northern Ireland. If you go across to Scotland, you can see the same thing on the west coast. The rock is common basalt, but because of cooling and shrinkage, it has that columnar appearence. Geologists have a special name for it; it's called, what else, columnar jointing. The age on those are about 60 million years and formed from intense volcanic activity when highly fluid molten rock was forced up through fissures in the chalk beds to form an extensive basalt plateau. This plateau extends all the way across to Scotland.
I have never been to Scotland/Ireland, even though almost all of my ancestors are from that part of the world......
By Capt. Paul (Eclogite) on Saturday, July 14, 2007 - 11:04 pm:
I forgot to mention that you don't need to visit Ireland to see columnar jointing. Devils Tower in Wyoming is a prime example, as it Devils Postpile in California. For something a little closer to home, there is supposedly a little area in the Keweenaw where you can see columnar jointing. The Dr. and I are going to check out this spot in a couple weeks when we are there; 21 days from now, we will sitting on the shores of Superior watching the sun go down......