Black or dark stools are a common side effect that may be the harmless result of unabsorbed iron. Whether you are taking iron supplements alone or a multivitamin with iron, you may experience this. Check with your doctor or healthcare provider to find the cause of black stools.
CCYYMMDD is just yyyyMMdd. The CC is for the two digit century which is the same as the first two digits of the year. I think people do that because people see yyyy and still type 12 instead of 2012. So today's date would be 20120717.
The SEG Y (sometimes SEG-Y) file format is one of several standards developed by the Society of Exploration Geophysicists (SEG) for storing geophysical data. It is an open standard, and is controlled by the SEG Technical Standards Committee, a non-profit organization.