Sunday, March 29, 2009

Maybe it has all been virtually fake?

Well, the LiDAR has shown us that a digitally rendered landscape offers, in some ways, more insights into the geology than a picture, a hike, or a stereo model. Of course, the field observations are the most fun and provide the true context that allow us to gain those epiphanic insights. But...have we ever done any real field work? After going through some old photos I started to wonder if the whole thing has been a synthesized digital construct fed into my brain from some inscrutable computer network. I believe these are KC's photos.

Wednesday, March 25, 2009

Bullseye Bar in Surfer

Surfer is an old favorite of is good for quickly displaying the data and creating intuitive views. I think that this perspective clarifies the geometry and orientation of the landslide.

Dogleg Bar in Quick Terrain Modeler

Just fired up QTM today to see what it is all about. I can tell it is powerful, but am not yet qualified to use it. Working on it.

Thursday, March 12, 2009

Profile Prototype

Here is a first stab at a simple, annotated profile from the LiDAR data. It is a very slightly smoothed curve. I used a 50 point weighted average to get the smoothest profile that clearly mimicked the more data-rich version. 

Have not yet gotten to extracting the lava flow profiles, but have added their longitudinal extents. Also added the main landslide complexes and some key sites to enable yeehow orientation. Overall the profile is pretty good. The only aberrant points show up where I tried to 'drive around' some of the no-data points and ended up treading on a terrace, so to speak. Next example will be the longitudinal changes in local gradient.

Friday, March 6, 2009

Olivine Separates: 051107-2(3)

Here are some images that show that status of the olivine mineral separation efforts. This sample contains the most olivine so far. It is one of two samples from the upstream end of T4 in The Hole in the Ground. Can someone tell me if two samples were collected from the same rock?

Anyway the point of this post is to show Cassie the status of our efforts to separate and clean the olivine crystals. On several crystals you can see some adhering matrix crud. We know we need to get that off. As for the black specks...?