Igneous Rocks of the St. Francois Mountains, Missouri

The ancient St. Francois Mountains of southeast Missouri expose 1.5 billion year old igneous rocks. Along shut-in's, or narrow river valleys, granite and rhyolite exposures are easily accessible and make an ideal location to observe different igneous textures.

[@MB-jg4tr]

Look for the hexagonal basalt colums SE of Sullivan MO. The area is ancient volcanic

[@deannekliene2673]

I lived on ron mountain lake for about a year......

[@struggle375]

cool video

[@StanJan]

So i am having an issue. I have done the research and today, with nearly 200 active volcanos on earth, there is not a one of them producing any type of granite. So.......... exactly how are we being told that volcanos produce granite ? Seriously. Something "dont work" here...

[@cavesprite]

I don't think you understand what granite is. Granite is cooled magma, it is a strictly intrusive igneous rock. The only way granite can come to the surface is when a volcano basically dies and cools inside and over millions of years and weathers until the interior cooled granite is exposed. Volcanos don't really just "produce" granite per se. All the granite forming right now will take millions of years before it is fully cooled and formed. It isn't possible for you to see granite form in your lifetime. Also, there are way more than 200 active volcanos on earth

[@StanJan]

@@cavesprite thank you :) since I originally wrote, I have learned much.

[@quiettime1195]

You should know some granite beds n Wyoming is 3.5 b. Some of which is formed from oceanic and continental crust.