Hello, I found this in the Sandy River bottom about 20 miles up from the Columbia River in Oregon. I think this is granite, but it looked like the folks here are pretty good at rock stuff and can tell me what kind. This thing weighs 5.7 lbs, is 9.5 inches long and 5.25 inches wide at the largest. There are striations on the sides which looks like there was something wrapped around it. Any and all feedback is appreciated!
