Information about Petroforms

Petroforms, or also known as boulder outlines, or boulder mosaics, are usually prehistoric, human made shapes and patterns that were made by arranging rocks on the open ground. Petroforms can also be a rock cairn or inukshuk, an upright monolith slab, a medicine wheel, a fire pit, or simply rocks lined up or stacked for various reasons.







Petroforms were used as astronomical calendars, with rocks aligned to solstice and equinox sunrises and sunsets. They are often found in higher areas, on hills, mounds, ridges, and natural rock formations. Higher ground allowed humans to carefully observe the horizon to mark and measure astronomical events. Some rock alignments point out four or more directions, lunar events, the rising and setting of planets, the stars, and other astronomical events. Aboriginal groups also made shapes of humans, snakes, turtles, fish, bears, cougars, thunderbirds, medicine wheels, circles, rectangles, and other complex geometric shapes that are still intact today. Petroforms are often related in some ways with earthen mounds. Mounds were sometimes built over the older petroforms, or later made near them. Petroforms also marked out the area for various ceremonies, sweatlodges, fasting, and sacred fires. They often mark an important or sacred area, or point to an important place. Offerings and prayers are made in these areas, along with initiations and vision quests. Petroforms also mirrored the night sky, and the patterns of the stars, similar to astrological signs and symbols. The Sioux have oral stories of the serpent in the sky, a turtle, a bear, and other patterns seen in the stars. What is often known today as Orion's belt was one prominent star formation, along with the central and stationary north star, also named as Polaris. What is now known as the planet venus is the very bright morning and evening star. Petroform sites in North America can be found in Manitoba, Saskatchewan, Alberta, Wisconsin, Minnesota, Wyoming, Montana, along the Mississippi River, the Missouri River, and elsewhere.

Many petroform sites are important archaeological areas that need to be protected from vandals and misuse. In the past, many petroform sites have been disrespected and destroyed. More education is needed to ensure that petroforms are not neglected or damaged by far too many tourists and visitors to these sites. In some cases, sacred, intact, remote sites should not be disturbed, except for important research and exclusive ceremonies. Petroforms, effigies, and other rock art can easily be mistakenly destroyed due to high populations of visitors in the area. Trails should not be made to some intact and important historical sites. Any other obvious signs that point out rare and significant locations should also be avoided. Enforcing specific laws may also be necessary to protect some areas.

Petroglyphs and pictographs are quite different, because petroforms are often made from large rocks and boulders over large areas of ground, unlike the smaller glyphs and graphs. Petroforms can also be used in more complex ways for astronomical predictions, mapping of the sky and ground, and for complex ceremonies that help to memorize many oral stories. Petroforms are similar in some ways to medicine wheels which are also aligned with sunrises and sunsets, equinoxes, solstices, lunar events, and star patterns. Inukshuks are very similar to some petroforms.

History

Some of the petroform shapes might be over 2,500 years old. It is difficult to date all of them accurately because of a lack of soil deposits in some areas. There are claims that some petroforms are up to 8,000 years. Like the petroglyphs, many petroforms have complex and lengthy teachings that have been passed down orally by the Ojibway, other First Nations, and the Midewiwin (Grand Medicine Society). Some teachings may have been lost, along with the peoples that originally made some of the oldest petroforms in North America. In some States and Provinces, there are laws to protect these important archaeological and historical sites. Vandalism has occurred in the past, and careful protection of these interesting sites is needed. Perhaps some native elders have decided to keep these areas hidden or secret to avoid the possible destruction or altering of sacred sites and memories. One can learn far more about these ancient peoples when there is greater respect given to the ancient ways and artifacts left behind so long ago. Ancient civilizations thrived in North and South America, with grand architecture, math, trading networks, trails, canoes, governing structures, astronomy, symbol making, scrolls, mounds, and more. All of this occurred long before the arrival of Europeans in the 1500s and 1600s. There were very few studies or specific mention of Manitoba petroform sites until the 1900s. The first detailed studies and descriptions of some sites in Manitoba were done by Dr. J Steinbring and R. Sutton after the 1950s.

Localities

Whiteshell Provincial Park

One of the locations of petroform sites, including effigies, is in Southeastern Manitoba, in Whiteshell Provincial Park, Canada. Whiteshell Park is named after the white cowrie shells used by some Anishinabe peoples in ceremonies. The natural landscape of the park, with many large boulders left behind after the last ice age, gave humans the opportunity to arrange them into many human made patterns. Some boulders appear to be carved, chipped, or altered to look like turtle heads and other animals. Petroform shapes were used to guide travelers, point out the directions, for astronomy, as memory devices, and for ceremonial use. Different colours of rocks were used in some of the petroforms. Petroforms provide a way to memorize long oral stories and ideas associated with the shapes, the number of rocks, and the geometrical patterns of the rocks. These ancient sites are in need of protection from anyone who might accidentally or purposely move any of these ancient rocks that would destroy their astronomical alignments. Specific laws are set up to protect them from vandals, and to preserve them intact for generations to come. Today, too many visitors, trails, and tourists in some areas may threaten the integrity of some ancient sites.

The Southeastern Manitoba sites contain all the many variations of petroforms from across North America, which suggests that many of these rock art shapes originated there, in the central area of the North American continent. The Whiteshell River runs into the Winnipeg River which is the only water route for prehistoric travelers and later fur traders to canoe directly across the Canadian Shield between Lake Winnipeg and Lake Superior. The two rivers meet in this park and funneled prehistoric native traders from across the western prairie rivers, from the northern lakes, from south along the Red River, and from the Eastern Great Lakes.

There are many unknown questions about these fascinating rock shapes that are found in the boreal forests of Manitoba, on very large, bare, flat, surfaces of the Canadian Shield granite rock ridges. The granite was made smooth and flat due to the last ice age as large glaciers passed over the ridges. A large nine acre site exists in the Whiteshell Provincial Park and may possibly be the largest, intact petroform site in North America. This site is protected by the Province of Manitoba. There are also many other smaller sites in the park, and some sites elsewhere in Manitoba, North Dakota, Montana, Wisconsin, etc. The word "Manitoba" possibly comes from two Ojibway words meaning where the Spirit, or Manitou, sits. The locations of these petroforms are considered sacred ground by many, and the area was used for ceremonies, to pass along stories, share knowledge, and for elders to gather. One story indicates that this is the general area where the first human was lowered to the Earth. Whiteshell Park has some of the oldest granite bedrock areas on Earth that are mostly composed of a pink coloured granite, or smooth granite ridges, sometimes perfectly bare and flat,and sometimes a mix of red and grey granite. There are some very large flat areas of this pink, or red coloured, felsic granite that were excellent areas for aboriginal peoples to regularly gather in large numbers without causing a lot of muddy trails and ground. Some of the granite rock is about 3.8 billion years old. The very large flat surfaces of granite resemble a concrete city scape, which provided an ideal place for many prehistoric travelers and traders to gather on dry, open, flat, and high ground.

The Canadian Shield is an ancient bedrock of mountains that have been scraped down to smaller ridges by many ice ages. These ridges would have been excellent ancient highways to walk across a land of wetter areas, dense forests, lakes, and away from the main river canoe routes. Native peoples used the landscape in a reasonable and wise way, that allowed them to more easily move in search of food, for travel, for gatherings, for ceremonies, and for exploring. These ancient rock ridges became valuable routes that snake through the thick forests and across wet and difficult terrain. Petroforms made upon these granite ridges would have been partially a natural outcome based on the importance and use of the ridges for practical reasons and the abundance of glacial till and boulders to make the petroforms. The Whiteshell River and Winnipeg River routes were used by natives, fur traders, and trappers, and were the main routes to the western prairies from the Eastern Great Lakes and rivers. The petroforms found in the Whiteshell River area are close enough to the canoe routes or river highways that native peoples needed and used.

Other very similar rock circles and medicine wheels can be found across North America, but sites elsewhere do not have the diversity of shapes that the Whiteshell Park sites have. The Whiteshell Provincial Park is named after a white shell, or the miigis shell (a cowrie shell) that was very important to many native peoples across North America and elsewhere in the world. These shells were used for ceremonies and they are found naturally from the shores of the Pacific Ocean. The shells were a part of an extensive prehistoric trading network across North America. Copper, flint, and other types of minerals were also used and traded from far away. Stories written on birch bark scrolls by the midewiwin document some of the history of Ojibway migrations and the discovery of white miigis shells along Lake Superior and elsewhere.

Turtle Mountain Provincial Park

There are areas in and around Turtle Mountain Provincial Park that have many medicine wheels and other large petroform shapes. The Turtle mountains are a hilly, rocky terrain, with many small lakes. The glacial till left behind provided plenty of rocks and boulders to pile, line up, and to make many medicine wheels and petroforms. The lack of agriculture in the area helped to protect many petroforms from destruction. The Turtle Mountains are part of the Mandan trail, and the Sioux also came through the area. The landscape features, and a long natural ridge known as a serpent that goes through North Dakota, were known and named by native peoples. Natural ridges, hills, and human made mounds were also used for astronomical purposes. Higher areas provided an easier way to observe the horizon, sky, sun, moon, planets, and stars.

Wisconsin

The petrofrom sites in Wisconsin are being studied more closely, and can be dated more easily because of soil deposits over centuries. Many other sites have no layers of soil deposited around the petroforms. Forested areas and soil cover have partially protected many of the petroforms in Wisconsin and Minnesota. In many areas across the prairies, large circular medicine wheels were made as astronomical devices, directional maps, and for ceremonial use. Some of these medicine wheels are large, and many were destroyed for agricultural needs by clearing the grasslands of any rocks. Some are intact, such as in the Turtle Mountains, and other sandy, rocky, or more remote areas that had less crop farms and settlements. Mound building was also associated in some way with petroform use. Petroforms originally predated the use of mounds and other human made earthen works that required more time and effort.

See also

• Cairn
• Hopewell culture
• Inukshuk
• Mound
• Mound builder (people)
• Petroglyph
• Petrosomatoglyph
• Pictograph
• Rock Art

References

• Current Research on Wisconsin Petroforms by Jack Steinbring
• Manitoba Conservation and Manitoba Historic Resources
• Petroform-Mound Linkage in East Central Wisconsin by Jack Steinbring
• Petroforms As It Is Above, So It Is Below by Patricia A. Kurtz

Steinbring, Jack 1970 "Boulder Site In Southeastern Manitoba," in Ten Thousand Years: Archaeology In Manitoba, Walter Hlady, Edit., pp. 223-268, Manitoba Archaeological Society, Winnipeg.

Danziger, E and R.T. Callaghan 1986 “The Southeastern Manitoba Petroforms,” in Studies in Manitoba Rock Art: Petroforms, Province of Manitoba Historic Resources Branch, 2nd Edition, Second Printing, Winnipeg.

External links

• Bannock Point Petrofoms
• More information from The Middlewesterner
• Petroforms of Montana
• Petroforms of central Wisconsin