This article was published on May 6, 2006, and was taken off my blog by Google because the company labeled McHenry County Blog a “spam blog.”
Here’s the boat and some of the Illinois State Geological Survey folks who were in Crystal Lake the better part of two weeks ago.
They dragged it behind the boat, back and forth, back and forth.
The mission goal is to update depth findings.
Or, to put it in the more specific language of geologist Brandon Curry,
“A bathymetric map shows lines of equal elevation of the lake’s sediment, and should be accurate to within a foot or so. There are earlier bathymetric maps available, but this one should be the best one done to date.”
The image created by the Echosounder, Curry continues, will show
“a detailed surface reflection, and also provides some data on the shallow ‘acoustic properties’ of the surficial sediment. reported yesterday,
The combination of the two should result in an interesting map from which we should be able to classify the lake bottom sediment, and perhaps, aquatic vegetation, in addition to subterranean springs.”
The final photograph, supplied by Leila Zajac, as were the others, shows the screen which received the signals from the equipment.
Using some money from old grants and limited support from the ISGS, I will be working on the part of the record that should tell us about paleoclimate from about 7,500 to 9,000 years ago (why this time frame? It’s when we know Illinois went from moist to dry).
I will need more funding in a while to continue my study as I go up the geological column. I would imagine that there would be interest in a study of drought frequency (climatic) conditions over the past 2,000 years.
Can you think of local funding agencies that would likely endorse such a project?
The asking price… about $15,000. The study could be done in one year.
Agencies such as NSF don’t generally fund projects that are that limited in scope geographically. Please don’t be offended by me pouncing on you this way… I’m just testing the waters.
How about the villages that have water bans in effect?
Might not they be helped by knowing what happened in the past, so they can adapt in the future?