Calcined Bone

When bone is burnt by a fire it can undergo a range of changes in appearances, such as calcining. Calcining, characterized by its bright white colour, is caused when bone is burnt at a higher temperatures. The bone can shrink, become more white or chalky in appearance, more fragile and more likely to fragment into smaller pieces. These pieces of calcined bone were collected during the summer of 2017. Calcined bone indicates the presence of a hearth at the site.

Core

A core is a larger piece of stone from which many smaller flakes are removed. These flakes are then turned into tools or are utilized as they are. There are many different types of cores, but a common way to describe them is by the direction(s) flakes were removed, or by the shape of the core. For example, unidirectional cores have flakes removed all in the same direction. That has had many stone flakes removed to make other tools.

Obsidian

Obsidian is commonly known as volcanic glass. It forms when a volcano erupts and the lava is cooled extremely quickly, such as when it flows into a water body. In Alberta obsidian is considered to be an “exotic material” because it does not occur here naturally. When we find it here it tells us that people in the past engaged in long distance trade, usually with people in British Columbia or the Yukon. In 2016 Teresa found this lovely obsidian flake at site FaPr-6 located near the community of Caroline.

Debitage / Flakes

Debitage, or flakes, are bits of stone chips that are left behind while making or modifying a stone tool. This artifact type has distinctive features that make them easily recognizable to archaeologists and clearly distinguish them from naturally occurring broken rocks.

Endscraper

This is a tool used to peel away unwanted matter from an object. It was often used to prepare animal hides and would have been attached to a handle made from either wood, bone or antler. There are different types of scrapers in Alberta including sidescrapers, endscrapers, and thumbnail scrapers. Scrapers are one of the most common types of formed tools we find in Alberta. Pictured here is an endscraper that we collected during the summer of 2017.

 

Wedge

This little guy is a wedge, or sometime as it is sometimes known as its french name, pieces esquilles. These tools are thought to have been used to split organic materials like wood and bone, much like an ancient stone chisel. One of the sharp sides of the wedge would be placed against the material that you wanted to split, and you would hammer the other end with a stone to drive the wedge through it. Since this little tool would literally be caught between a rock and a hard place, using a wedge would often create bipolar flake scars. You will also often see crushing and lots of hinge fractures on the tops and bottoms of these tools, where the edges are being crushed against the hammerstone and the material being split. As a result, wedges often have a short and squat rectangular body shape.

This particular specimen is made from a very coarse grained quartzite. Based on the reddish hue of the stone, it may have even been heat treated to improve the quality of the material. It was found near Wabasca-Desmarais, on a high ridge that overlooked a broad stream valley.