Geology of Katmai National Park & Preserve
Katmai National Park & Preserve, or more precisely the Aleutian Range which is within the Katmai National Park & Preserve is a portion of the Ring of Fire – nothing to do with Johnny Cash – this Ring of Fire is in the Pacific and is one of the most active volcanic belts on earth. The Aleutians grew as a direct consequence of the movement between the American and the Pacific plates. The whole of the Katmai region trends in a northeast / southwesterly direction along the Aleutian Range, dipping slightly towards the southeast. Katmai National Park & Preserve is bisected by the Bruin Bay Fault, the northwestern side of the fault displaying rocks from the Jurassic and Tertiary periods and the southeastern side of the fault being relatively flat lying sandstone. This is a very geologically complex area indeed.
Katmai National Park & Preserve has four very distinct regions;
- the Aleutian Range
- the lake country
- the coast
- the lowlands of Bristol Bay
Okay, it’s a bit irritating to start with and it sure takes a lot of getting going, but it’s pretty good once you get past all of that stuff.