Thanks Hog and Bow for your explanations. I'm curious now as to why the ovoid showed up in the first Quantec survey but in the second Quantec survey it was "superseded" by T10 to T12. Just wondering why the ovoid itself didn't show up as one large "T" anomaly in figure 2-34 of the Report? Any ideas? Arrgghh, can't wait for the 3D!!!!