The Thyazzi site is situated in the northeastern corner of Manitoba, near the first large bend in the North Knife River (Fig. 1). Today it is about fifteen miles inland from the coast of Hudson Bay and just over thirty air miles northwest of Churchill, Manitoba.

In 1953, Dr. J. L. Giddings, accompanied by Mr. T. Jawbone, visited Thyazzi and made a surface collection of flint tools. The description and location of the site in Gidding’s article (1956a) is accurate except that the site is too far south on his sketch map of the Churchill region. Thyazzi was relocated by helicopter in 1965 with Mr. Jawbone again serving as guide. Part of the large bend in the North Knife River is shown in Fig. 2, 2 while one of the Chipewyan winter cabins, which Giddings mentioned as bordering the river, is shown in Fig. 2, 1.

The Thyazzi site is situated on a sandy ridge surrounded by a swamp and marsh low relief area of Pre-Cambrian bedrock and on the edge of an area classified physiographically as the Hudson Bay Lowland. The site is near the tree line and adjacent to the coastal-tundra zone. Surface deposits of marine and alluvial materials are overlain by podzolic and tundra soils supporting sporadic conifer stands.

Marine strand lines at this latitude extend sixty miles inland. Following the glacial retreat, uplift of the land left a series of beaches along the coast of Hudson Bay. The sandy ridge on which the site is located may be one of these beaches or an offshore bar (Fig. 3). The fact that the ridge is sloped sharply on only the eastern side and the fact that eskers are not abundant along the coast, indicates that the ridge is not a glacial feature; its structure and distance from the river indicates that it is not a river terrace. Probably at the time of its formation, there was a tidal flat where the North Knife River entered Hudson Bay.

In the aerial photograph (Fig. 3), the North Knife River occupies the lower right-hand corner, the larger Seal River the upper-left, while the streams in the upper right-hand corner drain into Hudson Bay which is off the photograph to the right. The oblique arrow points to the main occupation area of the site, the area visited by Giddings. The sandy ridge runs north and south, while just below the arrow is another, shorter ridge extending eastward at a right angle. This eastern extension of the site is five to ten feet lower in elevation. The vertical arrow which points approximately north, shows the southern extension to the site. The straight-backed series of lakes to the north of the site are the result of bedrock control. To the north and east of Thyazzi is a ridge 30.5 meters in elevation. It meets the midpoint of the tail of the oblique arrow.

Detailed topographic maps do not extend far enough west to include Thyazzi. Thyazzi is, however, west of the 30.5 meter ridge and the land rises to the west. The ridge is also higher than the river banks which, for most of their southward length, have an elevation of 30.5 meters. These factors, plus the height of the ridge (Fig. 4) and the known proximity of the 38 meter contour line on adjacent topographic maps, suggest that the elevation of the top of the Thyazzi ridge is 35 to 38 meters above sea level, with the eastern extension around two meters lower.

The Thyazzi ridge is less than a mile from the North Knife River and separated from it by a flat marshy plain. The cultural material is found on the ridge which rises for the most part five meters above the plain. A westward looking view of the ridge (Fig. 2, 3) also shows a white object below the ridge. This object, actually about two meters high, is part of a Chipewyan canvas tent used during winter caribou hunting in 1964. The University of Manitoba tent can be seen on top of the ridge. The general contours of the ridge, excluding the sourthern and eastern extensions, are shown on Fig. 4.

In 1965, two extensions to the site (Fig. 3) were discovered in forays made from the base camp on the main ridge. One extension protrudes eastward from the south end of Thyazzi proper. The bulk of the material on this subsidiary ridge was found on exposed gravelly areas 180 to 230 meters east of the south end of the main Thyazzi ridge. A few flakes were found still further east at the end of the ridge in an area of large sand blowouts. Compared with the main ridge, however, the eastern extension is more completely covered with moss and lichen. The area was probably never shown to Giddings, possibly because Mr. Jawbone had never collected artifacts there, but more likely because a Chipewyan graveyard is located at the eastern tip.

The southerly extension is about 900 meters south of the southern end of Thyazzi. This ridge runs roughly east-west and is somewhat weakly connected to the Thyazzi ridge. The ridge, which may be slightly higher than that of Thyazzi, has a fine gravel and heavy moss covering which, however, yielded a few artifacts in exposed areas. The ridge, seen from the nearby lake to the north (Fig. 2, 4), continues to meander to the north and west where additional material may yet be found. As at Thyazzi, there were numerous recent brush shelters and evidences of caribou hunting.

The main part of Thyazzi is characterized by sand and gravel blowouts, possibly the result of moss removal due to the trampling of caribou. The artifacts are distributed on the ridge for 600 meters north and south and 50 or more meters east and west. West of the blowout areas there is muskeg and beyond this is a lake about 540 meters long. The east end of the ridge is lined with spruce trees, which as Giddings (1956a: 258) has noted, are often slow-growing and gnarled, unlike the same types bordering the river. Two granite boulder fields cut across the site, the smaller one at about 275 meters south of the north end and the larger about 100 meters further to the south (Fig. 5, 1). These boulder fields may have been advantageous to the hunter in slowing the caribou in their movement along the high ground. Generally, the ridge rises...