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Baculite Fossil in Shale viewBack to TUCSON SHOW FINE MINERAL COLLECTION and INVENTORY LIQUIDATION AUCTION (set 2 of 2) - FEATURING SPECIMENS FROM THE KAY ROBERTSON COLLECTION - end Thursday February 14th, 2019

Bearpaw Formation, Montana
  • Starting Time:2/7/2019 06:45:00 PM(CST)
  • Ending Time:2/14/2019 06:50:51 PM(CST)
  • Time Left:Auction Is Closed

  • Start Bid:$10
  • Reserve Bid:$10
  • Current Bid:$242
  • Size:Small Cabinet
  • Size Description:8.4 x 7.6 x 3.8 cm

Description:The Bearpaw Formation (Bearpaw Shale) in Montana is a late Cretaceous formation dating around 75-80 million years ago, and is the source of some excellent ammonite fossils, including the Baculite species Baculites compressus. This ancient cephalopod species is fairly well-known from this locality, but it's difficult to find good matrix specimens like this on the market. An 8.0 cm, smooth, well-preserved shell of the former Baculite can be seen flaring off the grey shale matrix. The series of camerae or chambers on the specimen are notably distinct and eye-catching. A fantastic example of this classic and hard to find material from Montana, especially because it features such a good sized fossil ON matrix. It should be noted that the Bearpaw Formation is the same formation that produces the gorgeous rainbow Ammolite specimens in Alberta, Canada (just over the border from Montana).

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Current Bids

Amount Time Date Bidder
$242 06:45 2/14/2019 patchfinder
$232 06:44 2/14/2019 hiawatha
$228 06:44 2/14/2019 patchfinder
$208 06:43 2/14/2019 hiawatha
$178 06:43 2/14/2019 patchfinder
$168 06:43 2/14/2019 hiawatha
$167 06:43 2/14/2019 patchfinder
$137 06:38 2/14/2019 hiawatha
$117 06:38 2/14/2019 patchfinder
$107 06:37 2/14/2019 hiawatha
$107 06:37 2/14/2019 patchfinder
$87 06:15 2/14/2019 hiawatha
$77 06:15 2/14/2019 tmr
$61 06:11 2/14/2019 hiawatha
$38 06:41 2/9/2019 tmr
$30 11:35 2/9/2019 eqynvet
$25 11:35 2/9/2019 nova486
$10 01:58 2/8/2019 eqynvet