CO2 does not fall back quickly:
graph shows the IPCC 2007 CO2 liftime from a computer model run that shows what happens to a single instantaneous pulse of CO2 emitted to the atmosphere. One thousand years after the CO2 is emitted to the atmosphere 20% is still there according to this model.
only zero carbon
The decline shown is mostly due to CO2 ...
This report on the stratigraphy is probably a good place to start.
Additonally, searching Google Scholar for Wasatch Range geochronology brings up a number of papers on the geochronology of specific formations if you are interested in that.
fracture formula What is the method of injection and fluid you are using? Apply a leak off test to the formation after drilling out casing shoe and your 5-10m into open hole. I’ve attached two links that may be helpful. formation fracture pressure
a list of methods
There are also plenty of apps for you’re ...