Casting the Earlham Castoroides, Part 3

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We had a another full day today, only interrupted by my lunchtime lecture on “Sinistra” for the Earlham Biology Department (and, I have to say that I was impressed that more than 50 faculty and students showed up for a mid-day talk).

Ray started yesterday working on the two largest and most complex pieces, the cranium and the lower jaw. We had a problem with the cranium, in that the original reconstruction of the roof of the skull had been done incorrectly. The Earlham collections include a second, less complete Castoroides cranium that preserves the dorsal sutures, and we used that to remodel the cranium we’re casting (above; the white area is epoxy putty, that we used for the remodeling). With the corrections made, he was able to finish making the complex clay basin to hold the cranium:

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It also took awhile to figure out how to mold the lower jaw, but Ray eventually came up with a design for a 2-part mold:

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In addition to the work on the skull, we also turned over yesterday’s molds, including the right hand:

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…right ribs 5-8:

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…the last 6 caudal vertebrae:

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…the right radius:

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…the right humerus:

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…left ribs 5-8:

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…the right tibia and fibula:

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…and right ribs 1-4:

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We also did first pours on several other bones, including 8 caudal vertebrae in two molds:

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…and the left humerus:

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Finally, late in the day we poured our first cast, a right humerus:

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There’s still lots more to come; we’ve molded less that half the skeleton so far!

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This entry was posted in Castoroides, Paleontological techniques. Bookmark the permalink.

1 Response to Casting the Earlham Castoroides, Part 3

  1. Geo says:

    Those molds look great and that first casting is awesome. Great job, Ray. The guru of molding and casting.

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