You are looking for a preform tube.
Please use caution when driving the Legacy Trail. Be aware of back roads intersecting with highways and wet gravel roads (especially fair weather roads).
Geology of the Canadian Badlands
Popcorn Rock/Bentonite Clay
Popcorn Rock is a naturally occurring mineral found at limited outcrops in the Badlands. The same geologic processes that are at work creating the beautiful limestone formations that attract visitors from around the world to the amazing landscape of the Badlands, are also able to produce a healthy crop of popcorn crystals. When popcorn rock gets wet it becomes extremely slippery.
As a geologist, I have a lot of questions about this description, but I've copied it verbatim from the original. 'Popcorn rock' is a popular term for aragonite crystals developed on dolomite, and bentonite is totally different. The landforms of the Badlands are developed in sandstone, not limestone.
This cache was originally created as part of the Legacy Trail produced by the Canadian Badlands Geocaching Association for the Best of the Bad Mega Event. The original cache has been archived, but has been recreated for the Wild Rose Homecoming Event.
The Legacy Trail
The Legacy Trail is a collection of geocaches that circles its way over 100 miles on country roads traversing some of the most scenic and spectacular landscape in this part of the Canadian Badlands. A large number of caches in a variety of types, sizes and difficulty are placed on the Trail. Every town, village and hamlet in the Canadian Badlands has its own cache. Some caches were named after local historic events and people, as well as celebrities who grew up in this area. Some caches were sponsored by geocachers who attended the Best of the Bad Mega Event. The Legacy Trail was produced by the Canadian Badlands Geocaching Association for the Best of the Bad Mega Event.
The Canadian Badlands
The Canadian Badlands in Alberta are like no other place on earth, home to the world's most extensive dinosaur bonebeds, badlands and hoodoos, and a world-class museum that shelters a 75 million-year-old legacy. The region is rich in culturally and historically significant sites that tell the story of the First Nations people and early settlers, and of a complex and diverse modern society that is still deeply rooted in the spirit of the frontier.