Identify Rocks from Lake Luzerne

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SUMMARY

The discussion focuses on identifying rocks collected from Lake Luzerne, with participants speculating on their composition. The primary candidate identified is granite, with one contributor suggesting it may also be Quartz Monzonite due to the presence of potassium feldspar and a lack of quartz. The quality of the images provided is noted as a hindrance to accurate identification, prompting suggestions for clearer photography techniques. The conversation highlights the importance of image clarity in geological assessments.

PREREQUISITES
  • Basic knowledge of rock types, specifically granite and Quartz Monzonite.
  • Understanding of mineral composition, including potassium feldspar and quartz.
  • Familiarity with geological photography techniques for better image clarity.
  • Experience with online resources for geological identification.
NEXT STEPS
  • Research the characteristics of Quartz Monzonite and its distinguishing features from granite.
  • Learn about effective geological photography techniques to enhance image quality.
  • Explore online geological databases for rock identification.
  • Study mineral composition analysis methods to differentiate between similar rock types.
USEFUL FOR

Geology enthusiasts, amateur rock collectors, and anyone interested in identifying and classifying geological specimens.

LightbulbSun
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Could someone identify these rocks I collected at Lake Luzerne yesterday?

http://sciencetexts.angelfire.com/lakeluzernerocks.html"
 
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A bit too blurry for me, but perhaps that's just my eyes.
 
Could be granite, but the pics are way too blurry to tell.
 
Yeah, it's a bit blurry because I took the picture off of my webcam so I apologize for the picture quality.
 
It's particularly the second picture I think looks a bit like granite, but I can't really tell. If it is, I'd think it would look like this: http://www.lewis-clark.org/media/NewImages/VIEWS/geol_granite-gray-hyndman.jpg
 
matthyaouw said:
It's particularly the second picture I think looks a bit like granite, but I can't really tell. If it is, I'd think it would look like this: http://www.lewis-clark.org/media/NewImages/VIEWS/geol_granite-gray-hyndman.jpg

I got an overhead shot of it and reduced the brightness. I hope this helps.

http://sciencetexts.angelfire.com/luzernerockbdark.jpg"
 
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The picture won't display.
 
matthyaouw said:
The picture won't display.

I added the picture onto the original website I posted. It's the third picture down.

http://sciencetexts.angelfire.com/lakeluzernerocks.html"

Let me know if you have any problems accessing it.
 
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Since the books in the background are in focus and the rock isn't maybe if you take a step back, you can get a sharp picture of the rock. Just a thought.
 
  • #10
Looks like a possible Quartz Monzonite to me. Seems to be a fair bit of k-feldspar and lacking in Qtz. That could just be the lighting in the photo however.
 
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