old sacramento Archives - ToursMaps.com ® http://toursmaps.com/tag/old-sacramento Fri, 26 Aug 2016 11:02:14 +0000 en-US hourly 1 https://wordpress.org/?v=6.0.9 Sacramento Map Tourist Attractions http://toursmaps.com/sacramento-map-tourist-attractions.html http://toursmaps.com/sacramento-map-tourist-attractions.html#respond Fri, 26 Aug 2016 11:02:14 +0000 http://toursmaps.com/?p=215066 Sacramento Geology A highlight of Sacramento State Park is the extreme age contrast of its geological features: outcrops of ancient Thompson Slate and the more recent deposits of red clay. The slate outcroppings are most prominent along the St. Louis River gorge above and below the swinging bridge behind the park headquarters. According to George Schwartz and George Thiel, in Minnesota’s Rocks and Streams, the slate beds formed from sediments in a mid-continental Precambrian sea. The weight of accumulated sediments compressed the lower layers to form shale which was later transformed into slate. Underground pressures and movements folded the slate

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