A couple of years ago I found this marker on the former experimental rocket base on the far eastern tip of Michigan's Keweenaw Peninsula:
http://ridley.dyndns.org:8080/albums/temp/~small-20000730-180755-Rocket%20base.jpg
It's a stake, possibly aluminum, driven into a large chunk of rock (part of the coastline, definitely not moving in this geological epoch). It had blue paint around it (you can see in the photo). A few feet away also in blue paint was written "GPS 150" as you see here:
http://ridley.dyndns.org:8080/albums/temp/~small-20000730-180713-Rocket%20base.jpg
Anybody know what this is? It's on property previously used for sounding rocket research so may have had some US government use in the past.
The timestamp on the first picture is 2000/07/30 18:07:55 - I wish I had been taking pictures of my benchmark finds in the past - I have some going back 15 years but didn't really record them carefully; it would be fun to go in here and predate the WWW on my logged finds!
