~ WN Hiroshima, WwW tance in relation to the radiation gradient in Hiroshima over Fr a@ ten-year period, In Hiroshima it certainly must be a large dis- nw Looking at aerial photographs of this Brazil site, though, you don't see any change in the foliage on WARREN: when you com over the rolling country up to the edge of this. ow activity part due to the fact that there are also chemical EISENBUD: There are differences in the radio- 10 changes associated with ths mountains which in turn give rise t2 to the fact that it's radioactive and these chemical changes 12 presumably are important, 13 be comsidered, Pen WARREN : Yes, it is. EISENBUD: Yes, 16 17 18 19 main radioactivity gets about, a couple of Kllometers across, 20 about 300 meters high above three--- WARREN: Is that a volcanic cone or this--- EISENBUD: intrusion in the center, 2l1 WOLFE: 22 EISENBUD: 23 2h 25 26 27 28 29 30 31 32 33 It's a volcanic cone with an alkaline The alkaline intrusion is where the Is it active? It was many, many thousands of years ago but not in historic times, This was a major volcanic eruption. The cone is about 50 kilometers in diameter and within the center of it is an alkaline intrusion which is just a knob which brought up a lot of rare earth minerals associated with thorium, and this is a few kilometers across and this is where the work is going on, WOLFE: WARREN: I haven't seen it, I've only read it. You don't run sheep on this because there's no grass or enough foliage? EISENBERG: No, that's not so. In fact, the cows graze on it and itts part of a grazing land and there's enough Stafford Wwe. 18 This is another factor that has to DOE/UCLA in pollen is, but this would even have to be considered in