Second day at Tierra Amarilla

The second day of sampling went well. Two springs, Iron Spring and Blowhole were successfully sampled. Three more springs were supposed to be sampled from, but were dry. On a trip to the anticline in November, these springs were still active. The change in water level is very interesting. I will return in July and again in the fall to see if the water level rises or recedes.
I will bring a YSI monitor out to the field in July (hopefully) to record fluctuations in pH, T, DO, and conductivity.
There are two springs located along the core of the anticline that have low water levels. The water is about 5m down from the surface. We think that the water in these holes is mainly from runoff and rain. The CO2 is still bubbling in them, but the DO, pH, T, and Conductivity are drastically different from the other springs (which we know are sourced from the subsurface) and much more similar to rain water. There might be a gaseous leak that is not correlated with the aquifer?
Photos from top: View from the trail of the southern terminus of the anticline, Blowhole spring, Minas Tirith, Iron spring, Mini Minas Tirith, Pressure Ridge with the Nacimiento in the background. All photos are courtesy of Ara Kooser. He has more photos at his flicker site:
http://www.flickr.com/photos/akooser/
Currently reading:
Redox Processes and Water Quality of Selected Principal Aquifer Systems, McMahon and Chapelle, Groundwater vol. 46, no.2, 2008