The Havre Badlands are a region of land bordering the Milk River, with sediments of Judith River Formation exposed via erosion. The river valley itself, previous to the last ice age, was initially formed by the Missouri River. But with the advance of the ice sheets, the Missouri was pushed southward into a new course. With the ice sheet's retreat, the Milk River took over the old course.

The Judith River Formation itself was deposited in a lowland environment between the older Two Medicine Formation to the west (80 to 74 million years ago) and the inland sea to the east. The Judith River Formation itself is 78 to 74 million years old, and comprises the Campanian Stage of the late Cretaceous Period. The Formation consists largely of tan sandstones and siltstones with some floodplain mudstones. The sandstones were laid down by large meandering rivers, with seams of coal that indicate the presence of standing water and swamps. Dinosaur remains in the Formation are typically quite fragmentary, with only a few articulated skeletons being recovered.

That's the technical stuff. What this list is about not only covers the Havre Badlands, where I am more knowledgable, but other areas as well, where hopefully we will have other members that know these different regions of Montana. And, of course, other matters pertaining to archaeology, even modern biology or sociology are perfectly acceptable. And if you have any images, please share them with the group!

We definitely look forward to hearing from you!