Another shot from Dana, this shows a small hand sample across the rim of a dike and the surrounding diabase. I can't tell with any certainty whether this is older dike material, or unusually fine magma chamber gabbro, though I'd lean toward the former. As we saw in Thursday's photo, there is a lot of variation in grain size, even within a single dike, and in yesterday's photo, the cumulate gabbro tends to be pretty coarse-grained (if that's what we were actually seeing in that photo).
Photo by Dana Hunter, unmodified. May 8, 2013. FlashEarth Location actually kinda looks like it might be right. Indexed
Is This Your Hat?
10 years ago
No comments:
Post a Comment