Frank Menser Posted October 13, 2009 Share Posted October 13, 2009 (edited) Acid Pit Not a fossil but interesting IMO... This is from Miami, Fla. What has happened here is rain falls on the limestone carrying with it weak carbonic acid (Thankyou JKFoam for catching that ). It gradually eats out holes such as this which later sometimes fill with calcite xls. These can sometimes be several feet across though this one is only about 4". Edited October 13, 2009 by Frank Menser Be true to the reality you create. Link to comment Share on other sites More sharing options...
Ron E. Posted October 13, 2009 Share Posted October 13, 2009 Acid Pit Not a fossil but interesting IMO... This is from Miami, Fla. What has happened here is rain falls on the limestone carrying with it weak carbolic acid. It gradually eats out holes such as this which later sometimes fill with calcite xls. These can sometimes be several feet across though this one is only about 4". Uh-oh, that looks like BROWN acid on the top, looks like someone ignored the announcer... Link to comment Share on other sites More sharing options...
Uncle Siphuncle Posted October 13, 2009 Share Posted October 13, 2009 Ahh, far out man! Grüße, Daniel A. Wöhr aus Südtexas "To the motivated go the spoils." Link to comment Share on other sites More sharing options...
jax Posted October 14, 2009 Share Posted October 14, 2009 Cool piece Link to comment Share on other sites More sharing options...
Uncle Siphuncle Posted October 14, 2009 Share Posted October 14, 2009 "Hey groovy guys, groovy gals....Love, peace, dope, bells, incense, crash pads, Hare Krishna......Far out, solid, and b*tchin'" - or somethin' like that if I may paraphrase Cheech y Chong..... Grüße, Daniel A. Wöhr aus Südtexas "To the motivated go the spoils." Link to comment Share on other sites More sharing options...
Bear Posted October 14, 2009 Share Posted October 14, 2009 (edited) I have always been a great fan of those 2 guys.... Up in Bancroft, Ontario there is a locale called the Bear Creek Digs. Large vertical cracks in the pegmatite infilled with calcite veins. In those veins were tourmaline and apatite crystals as big as a mans arm and books of mica the size of regular printed books. The Bancroft Chamber of Commerce has some of those large crystals in their little museum right in town. Over the centuries rainwater on the forest floor liberated tannic acid from the leaf midden which dissolved the calcite surrounding the crystals. 'Glory Holers' looking for saleable specimens came through and dug out the rotted calcite and the dirt to get at those huge crystals to sell to museums and collectors. As they flung the dirt into large piles, they passed over the small stuff. I took the family up there for a look - see. We collected the throw - offs from the midden piles....nice little crystals the size of your finger or thumb. Only a couple of facet grade chunks of apatite though, but the rest were fine specimens. Only saw one bear and it rained the whole day while we were in the woods rock hounding. Great trip, great locale, fun geology. Edited October 14, 2009 by Bear Link to comment Share on other sites More sharing options...
fig rocks Posted October 14, 2009 Share Posted October 14, 2009 (edited) Farm out Frank! Are we there yet??? Edited October 14, 2009 by fig rocks Link to comment Share on other sites More sharing options...
Frank Menser Posted October 14, 2009 Author Share Posted October 14, 2009 I have always been a great fan of those 2 guys.... Up in Bancroft, Ontario there is a locale called the Bear Creek Digs. Large vertical cracks in the pegmatite infilled with calcite veins. In those veins were tourmaline and apatite crystals as big as a mans arm and books of mica the size of regular printed books. The Bancroft Chamber of Commerce has some of those large crystals in their little museum right in town. Over the centuries rainwater on the forest floor liberated tannic acid from the leaf midden which dissolved the calcite surrounding the crystals. 'Glory Holers' looking for saleable specimens came through and dug out the rotted calcite and the dirt to get at those huge crystals to sell to museums and collectors. As they flung the dirt into large piles, they passed over the small stuff. I took the family up there for a look - see. We collected the throw - offs from the midden piles....nice little crystals the size of your finger or thumb. Only a couple of facet grade chunks of apatite though, but the rest were fine specimens. Only saw one bear and it rained the whole day while we were in the woods rock hounding. Great trip, great locale, fun geology. Ok...Since Apatite is one of mytop minerals I collect I am officially drooling... Fig...It's like...so there...cosmic y'know. Be true to the reality you create. Link to comment Share on other sites More sharing options...
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