Printable Copy of the Field Study Guide (PDF)
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Station #6: Upstream Cracks<br />
Activities<br />
1) Describe, with as much detail as possible, <strong>the</strong> appearance <strong>of</strong> <strong>the</strong> cracks in<br />
<strong>the</strong> bedrock at this station:<br />
2) Perform an acid test on <strong>the</strong> rock sample in <strong>the</strong> kit from this site: Which <strong>of</strong> <strong>the</strong><br />
following occurred:<br />
____ Acid bubbled right away with lots <strong>of</strong> bubbles<br />
____ Needed to be scratched with a nail to get it to bubble, minor bubbling<br />
____ Never bubbled<br />
Questions- Station #6<br />
1) Compare each <strong>of</strong> <strong>the</strong> following to those at Station 2 (swirls):<br />
Site Number Station 2 Station 6<br />
Crack Widths<br />
Crack Depths<br />
Acid Test Results<br />
Rock Type<br />
3) (a) How do <strong>the</strong> angle, width, and depth measurements <strong>of</strong> <strong>the</strong> cracks in <strong>the</strong><br />
bedrock at Stations 2 & 6 compare to each o<strong>the</strong>r?<br />
(b) How do you explain <strong>the</strong>se results?<br />
3) What evidence do you see around this station or from o<strong>the</strong>r stations that<br />
suggest humans have an impact on <strong>the</strong> area?
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