Dear Dr. Giunta:
Rob Rogers sent me a copy of your note, and I am very interested in your
foray into Guatemala. I suggest that you visit the Santa Cruz ophiolite
which was the subject of my Ph.D. dissertation (Rosenfeld, SUNY-Binghamton,
1981). The Motagua Ophiolite Trend, with few exceptions (i.e. the Juan de
Paz ophiolite described Muller in his dissertation, SUNY-Binghamton, 1980)
is quite dismembered and metamorphosed. These ophiolite fragments are very
interesting and should be compared with the unmetamorphosed and
stratigraphically continuous suite exposed in the western Sierra de Santa
Cruz north of the Polochic Valley and Lake Izabal. The key road link for
manageable access is between the towns of Panzós and Cahabón.

I also notice in your Costa Rica segment that you don't mention a visit to
the Nicoya Penensula nor the Santa Elena Peninsula. Since Nicoya consists
almost completely of basalt (Caribbean crust?) while Santa Elena is purely
serpentinite (proto-Caribbean??). I find the relationship between these two
exposures to be rather mysterious

Please contact me if you think I can be of help in any way. It sounds like
a great outing.

Josh Rosenfeld