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Because fitness for existing conditions does not guarantee long-term survival — particularly when conditions change catastrophically — the survival of many species depends more on luck than conventional features of anatomical superiority.

I believe that Whittington's reconstruction of Opabinia in 1975 will stand as one of the great documents in the history of human knowledge.

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The most commonly found fossils are brachiopods, horn corals (Heliophyllum halli), and crinoid stem sections; which are remains of the marine life of the Devonian geological period. When the pioneer settlers arrived in the area in the mid-1800s, they built some grist mills within the present-day conservation area.

One of these mills was run by an 11-metre overshot wheel.

The conservation area is home to a large diversity of species representative of both zones, and are found alongside sugar maple, beech, white elm and basswood, some of these native trees are: Sycamore, Sassafras, Cucumber Magnolia, Tulip-tree, Black Walnut, Maple, Oak, Ash, Pine, and Pawpaw.

Wildflowers are abundant, with more than 50-types found within the boundaries of Rock Glen Conservation Area. There are also examples of extinct animal life along the walls of the Ausable Gorge, small sea creatures that lived 350-million-years-ago.

The mill pond, although dry, can still be seen immediately upstream and southwest of Rock Glen Falls.

Part of the mill foundation has a platform that affords visitors an excellent view of the waterfalls.

Fossils of some of these ancient animals include: brachiopods, horn corals, sponge coral, crinoids or gastropods.

Located on the conservation grounds is the Arkona Lions Museum and Information Centre, which contains a large collection of birds and wildlife preserved with traditional taxidermic methods.

Rock Glen Conservation Area is a suburban conservation area located in the town of Arkona, in the municipality of Lambton Shores, Ontario, Canada.

The conservation is owned and maintained by the Ausable Bayfield Conservation Authority (ABCA).

In response to complaints from anglers that fish were unable to travel upstream to spawn, a Canadian Army demolition squad blew up the dam with dynamite.

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