Processed to 4636 feet, elongate black olivine and more secondary mineralizations in vesicles

Today we boxed rock core to a depth of 4636.0 ft, 150.5 ft deeper than two days ago.  The rock continues to hold together extremely well, making our job a bit easier.  Here are a couple images of the features we've been seeing lately in the core:

Both images are of the same rock, the one on the left is core that has been dried while the one on the right is still wet.  The greenish hue of many of the secondary vesicle fillings is more evident in the wet core, while the elongate, black olivine is easier to see in the dry rock.  Note that the green material is concentrated toward the bottom of the vesicles, and it grades upward to white.  We have even seen layers of fill in some vesicles, with a sharp horizon mid-vesicle where the secondary mineralization changes from green to white material.  As for the elongate black olivine, we've been seeing extensive amounts of it throughout many units, so it isn't correlated with rapid cooling near unit contacts like the elongate olivine observed shallower in the hole.  I suspect that this olivine is black from the low-temperature alteration that is filling the vesicles, rather than the typical baking that can turn olivine black.