7:30 AM – Leave Grand Junction

Stop 4 – Douglas Pass. – Green River lake shallow water environments.  The depositional his­tory of the lake and it relationship to the oil shale deposits in the basin center.

Stop 5 – ExxonMobil Colony site.  Colony is an ideal place to observe the geology of the Green River oil shale.  It offers a high overview point to present the stratigraphy and structure of the basin together with an accessible vertical exposure that in­cludes the Mahogany zone – approximately 100-150 high and over 1000 feet in length.  ExxonMobil personnel will also discuss some of the history of the site.