Palm Sander Ebooks Catalog
(Wyoming, Colorado and Utah) size 4 ft 3 in 1.3 m long With its short powerful digging fore-limbs and strong claws, Stylinodon was probably bear-sized, with a body like an aardvark and a piglike face. There were no incisor teeth in its massive jaws, but the canines had developed into huge, rootless, gnawing chisels. The peglike cheek teeth had the enamel on their surfaces arranged in a narrow band (taeniodont means banded teeth ). They grew continuously throughout the animal's life, which suggests that Sty-linodon had a diet of abrasive roots and tubers.
After constructing the best possible picture of what occurred at West Hadrosaur Bone Bed I told the crew to proceed with the excavation while I surveyed the sedimentary rock farther west. I admit that I don't have the patience I had back in the days when Bob Makela and I would labor in the same quarry day after day, all day long, removing minute amounts of rock and dirt with chisels and whisk brooms. But the chief reason I'm so quick to leave a new dig and begin exploring again is that I'm interested less in the bones per se than in what they reveal about large-scale trends. While not entirely consistent, for example, the combined ecological evidence from Landslide Butte and Two Medicine River strongly suggested that the horned and duck-billed dinosaurs living on the upland
Our list of collecting equipment was more specialized. To excavate fossils and rock samples, we shipped shovels, picks, rock hammers, crowbars, chisels, brushes, special glue, dental tools, and sample bags. To construct protective jackets around fossils, we bought large bags of plaster, plaster bandages, burlap, and dozens of rolls of toilet tissue. We had to accurately record the location of our fossil sites and places where we collected rock samples, so we ordered geologic maps and GPS (global positioning system) units. These small computers receive signals from orbiting satellites for calculating the precise longitude and latitude of the place where one is standing. A special instrument called a Brunton compass was required to measure the thickness of the rock layers that formed the ridges from which we collected samples for magnetic analysis. These samples had to be wrapped in aluminum foil and secured with masking tape for the trip back to the lab.
A used dental drill can sometimes be purchased for a moderate sum, but never cheaply. Such a unit hanging above the workbench is a fine addition to fossil-cleaning tools. For a smaller sum a small unit operating through a flexible shaft will give almost as much versatility and movement as the dental drill. These units usually consist of a motor the size of a soup-can that is hung above the workbench. A flexible shaft several feet long hangs from the motor and ends in a chuck that will accept a wide range of commercial and homemade abrasive tools. These units can be purchased new for about 35 and are handy accessories in jewelry making and fine metal work. The flexible-shaft hobby machines allow absolute control of speed through a foot-operated rheostat. So do the dental drills.
Orville Gilpin, chief preparator at the Field Museum, does most of his work with a small hammer and a series of chisels. Fine work is done under the binocular microscope. The sand bag cushions the specimen and reduces noise. Orville Gilpin, chief preparator at the Field Museum, does most of his work with a small hammer and a series of chisels. Fine work is done under the binocular microscope. The sand bag cushions the specimen and reduces noise. Bits of the shell of a fossil turtle are scattered through a block of sandstone. Orville Gilpin chisels them out one by one and cements them to the reconstructed piece. Bits of the shell of a fossil turtle are scattered through a block of sandstone. Orville Gilpin chisels them out one by one and cements them to the reconstructed piece.
With everyone pitching in, we hauled the picks and shovels up the ridge and set to work. Our goal was to expose an area of the egg layer about thirty feet long by fifteen feet across, which would require us to remove about thirty to forty tons of overlying rock. It was a long, hard day, but with about ten people helping, we were nearing the top of the egg layer by the end of the afternoon. Once we got close to the top of the egg-bearing layer, we would trade our picks and shovels for smaller rock hammers, chisels, and dental tools to excavate the eggs without breaking them. But we could begin that job the next day.
Woodworking Tools and Installation Tips
There are a lot of things that either needs to be repaired, or put together when youre a homeowner. If youre a new homeowner, and have just gotten out of apartment style living, you might want to take this list with you to the hardware store. From remolding jobs to putting together furniture you can use these 5 power tools to get your stuff together. Dont forget too that youll need a few extra tools for other jobs around the house.