After reding some info from what t4p wrote,i did a bit more research on mccracken and what we have already found so far.
Tell me,at what depth did we hit our 2 MAJOR INTERSECTIONS of gas so far,thats right,they were both within the Pennsylvanian host rock.Isnt it a tad unfortunate we have to wait to the end of drilling to flow test the most prolific oil and gas source rocks. Time will tell the tale.
http://www.blm.gov/utah/monticello/GEO.pdf
2.1.6 Pennsylvanian By far, the most prolific oil and gas reservoirs and source rocks of the MtPA exist within Pennsylvanian-age sediments. The Ismay and Desert Creek zones of the Paradox Formation have produced, and continue to produce, the majority of oil and gas in southeastern Utah (Chidsey and others, 1996b). The Blanding sub-basin of the Paradox Basin is confined within the MtPA. The structural development of the Blanding sub-basin will be discussed in more detail in the structural history section below.
Higher porosity levels are going to come from the host rock or sandstone in mccracken than leadville imo.