Discoveries in Manitoba Gravel Pits Uncover Ice Age Artifacts

Recent discoveries in gravel pits near Grunthal, Manitoba, have unveiled a range of artifacts dating back to the Ice Age. Quarry workers in the area uncovered these significant finds, prompting further investigation by scientists. According to Dr. Joe Moysiuk, curator of palaeontology and geology at the Manitoba Museum, the artifacts provide insight into prehistoric conditions in southeast Manitoba, a region that saw significant environmental changes long before humans inhabited it.

A new exhibit at the Manitoba Museum, which opened on December 1, showcases these findings through a mural that depicts life during the Ice Age in Manitoba. “A lot of the fossil evidence that went into creating this mural was found close to Grunthal, so it’s kind of a nice local story,” Dr. Moysiuk noted. The museum now houses a collection that includes various animal bones, primarily from mammals such as mammoths and extinct species of bison. Among the remarkable discoveries is a jawbone from a giant beaver, an ancient creature comparable in size to a black bear.

In addition to the bones, researchers have found evidence of muskox, a species still present but not common in southeast Manitoba today. The sediment layers where these bones were located also revealed fossilized pine wood and pollen, enriching the understanding of the region’s past ecosystem. “It’s a really interesting assemblage of fossils and one of the most diverse in the province,” Dr. Moysiuk explained.

While the relics from Grunthal are not as ancient as those discovered in Morden, which date back approximately 85 million years, they still hold significant historical value. The artifacts from Grunthal are believed to be around 40,000 years old, although ongoing research aims to refine this estimate.

Dating these artifacts involves two primary methods. While carbon dating has limitations for objects older than 40,000 years due to the decay of carbon-14, Dr. Moysiuk’s colleagues at the Manitoba Geological Survey are employing a more complex method known as optical dating. “The more approaches that we can use to give us information that’s consistent, the more certain we can be about the age of that material,” he added.

During the Ice Age, ice sheets in southeast Manitoba reached depths of over two kilometres. Dr. Moysiuk explained how these sheets fluctuated over hundreds of thousands of years, influencing the movement of plants and animals. This dynamic environment complicates the interpretation of whether the Grunthal finds represent species indigenous to the region or those deposited by glacial movements. Nonetheless, researchers believe the landscape around Grunthal resembled a boreal forest.

The mural, created by renowned scientific illustrator Julius Csotonyi, is prominently displayed in the Earth History gallery of the Manitoba Museum, situated behind the iconic giant ground sloth replica. Dr. Moysiuk anticipates that, in the future, exhibits featuring the actual artifacts from Grunthal will also be included in this gallery, further enhancing the narrative of the region’s prehistoric past.

These discoveries not only contribute to the scientific community’s understanding of Manitoba’s history but also serve to engage the public’s interest in the region’s rich geological and ecological heritage. The ongoing research promises to provide even deeper insights into the Ice Age and its inhabitants, preserving the story of Manitoba’s ancient ecosystem for generations to come.