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Today Deb and I made the two hour drive up to just outside the town of Formosa, Ontario, to have a look at the Formosa reef limestone, which is part of the Amherstburg Formation. This road cut is the type locality for this material, and it was humbling to be at the exact same location that researchers of yesteryear such as Ludvigsen and Fagerstrom derived their material that formed the basis of their published work on it. Here are some shots of the road cut. Hardly does it justice. This represents a single, massive biohermal knoll. I've wanted to visit this site for a while now, having read two key papers on it. Most of the non-coral fossils are found on the south edge of the cut, as it is assumed that this was the windward side of the knoll that captured much of the debris swept in by the currents.
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Spent seven hours in the field today. Not much to show for it other than the usual, but I thought I'd show the process on how I extract a big rock. I am of the belief that there is no rock so immovable that my use of persistence and force cannot dislodge it. This one has been one of many that I have flagged for future extraction. First step was to clear off the debris to get a sense of just how big this one is. You can't make out the depth on this one yet. The next step was to exploit a crack to pop off one of the upper pieces.
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Haven't posted any trips in a while, although I've been on quite a few in the last while. This trip occurred this morning, about 15 minutes' walk from my backyard. It started with low expectations and ended in high reward. There was an area I've been returning to for the last six years that I've pretty much tapped out. During that span, it has been generous to me, although it is now transitioning into forest. I decided to take a resigned poke at an area next door to it where a new housing development has been in progress for the last year, and like a lot of these new tracts there is a permanent adjoining drainage area that are sometimes spruced up into walking trails and ponds. It was in this area that they also trucked in a substantive amount of limestone, which I'll reasonably assume is Dundee Formation as that would be the cheapest to acquire. Or, it may be Lucas Fm from nearby Ingersoll. Poking around the brutally hard grey limestone riddled with corals, I figured it would be more of the same old, same old of the Dundee. I'm not a coral person, but I did find these ones neat. Some of these were bigger than basketballs. There were at least seven distinct types of coral I encountered. Here's a tiny sample of the ones I snapped pictures of:
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