iDigFossils Montbrook Dig

  • 3 days, 6 hours ago
  • 3 days, 17 hours ago
    Jeanette Pirlo posted an image in the group iDigFossils Montbrook Dig from the myFOSSIL app

    That’s one way of getting a 6ft long, 3 foot wide gomphothere skull jacket out of the field….
    We usually have to hand carry all jackets, regardless of size and weight, out to the van. Today, we were lucky to have someone near by who could help! #method

  • 5 days, 18 hours ago
    Jeanette Pirlo posted an image in the group iDigFossils Montbrook Dig from the myFOSSIL app

    What do you think we are up to over the next month at Montbrook?! #collectionsite #method

  • 1 week ago
    Jeanette Pirlo posted an image in the group iDigFossils Montbrook Dig from the myFOSSIL app

    Ever wonder what a baby rhino toe looked like? #fossil #collectionsite

  • 1 week, 2 days ago
    Jeanette Pirlo posted an image in the group iDigFossils Montbrook Dig from the myFOSSIL app

    Further update on that Gomphothere skull! Today, the crew successfully carried it up to the van for transport. Thank you to all of the volunteers that muscled this beautiful specimen a couple hundred yards to the waiting van! Phot Credit: Dr. Jon Bloch #fossil #collectionsite

  • 1 week, 3 days ago
    Jeanette Pirlo posted an image in the group iDigFossils Montbrook Dig from the myFOSSIL app

    What happened to that gomphothere skull you ask? Today it was successfully flipped! Between today and tomorrow, we will remove as much matrix as possible, at least until we reach the skull bones and tusks, in efforts to lighten the jacket, making it easier to carry out. Keep in mind that even after lightening it, we will need 6-8 people to help carry this giant skull up to the van and back into the lab! Stay tuned as we prep over the coming month! #fossil #collectionsite #method

  • 1 week, 4 days ago
    Jeanette Pirlo posted an image in the group iDigFossils Montbrook Dig from the myFOSSIL app

    The lady paleontologists from Montbrook! #collectionsite

  • 1 week, 5 days ago
    Jeanette Pirlo posted an image in the group iDigFossils Montbrook Dig from the myFOSSIL app

    Three-toed horse hoof found at Montbrook today! #fossil #collectionsite

  • 3 weeks, 3 days ago
  • 1 month ago
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  • 1 month, 2 weeks ago
  • 1 month, 4 weeks ago
    Michael Ziegler posted a new specimen in the group iDigFossils Montbrook Dig from the myFOSSIL app

    Michael Ziegler has contributed a new specimen to myFOSSIL!

  • 1 month, 4 weeks ago
    Michael Ziegler posted a new specimen in the group iDigFossils Montbrook Dig from the myFOSSIL app

    Michael Ziegler has contributed a new specimen to myFOSSIL!

    • Mike, could you give a bit of detail on what we are looking at in this photo? How is a paleomag sample collected and prepared? Just the very basics would be great. Thanks.

      • Of course! Montbrook paleomagnetism sediment samples were collected throughout the section to compare results from the top and bottom. All sample orientations were recorded in the field as well as on the sample themselves (that’s the black arrow you see on the pictured sediment). Since we all know how crumbly the sand-dominated Montbrook sediments can be, a heavy coat of lacquer was applied to harden the sample as well as ‘lock’ in the position of sediment grains. Back in the lab (in this case, my garage), a diamond tipped rock saw is used to cut the larger samples into smaller ~2.3cm cubes (standard size for the machinery used to conduct paleomagnetic analysis). Ideally, each larger sample will be worked into 4 of these smaller cubes. Cubed samples are wrapped in tin foil for rigidity/protection while they are being stored!
        -3 cubes are prepped to determine remanant paleomagnetic orientation, so it is essential that the direction of the black arrow from the larger sample translates over into these smaller samples. Why 3 samples? At least three samples are needed for analysis in order to be statistically significant. As with most things in science, the more repetitions/tested samples we can get, the better!
        – 1 other sample is prepped and designated for composition analysis in order to test what minerals within the Montbrook sediment lend themselves to magnetization (ex: hematite/magnetite).

        All in all, I have about 50 samples prepped. Paleomagnetism will not give us an exact age, but it is a great method to support the site’s estimated age which has been suggested strictly through vertebrate biochronology. With any luck, we may see a reversal in earth’s magnetic poles from the top of the geologic sequence from the bottom. If so (fingers crossed), this can be compared to well-documented magnetic records from the Late Miocene to further constrain the age of Montbrook!

    • I second David’s question. I’ve never physically done paleomag before so I would like to know.

  • 2 months ago
  • 2 months, 1 week ago
    Victor Perez posted an image in the group iDigFossils Montbrook Dig from the myFOSSIL app

    The spoils of Montbrook. #fossil #collectionsite

  • 2 months, 1 week ago
    Jen Welsh posted a new specimen in the group iDigFossils Montbrook Dig from the myFOSSIL app

    Jen Welsh has contributed a new specimen to myFOSSIL!

    • Hi Jen! You may want to post questions about specimens in the “what is it?” forum rather than in these groups. That’s available on the online site – not the app, yet! You should be able to get some help there!

  • 2 months, 3 weeks ago
  • 2 months, 3 weeks ago
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