Neal Lacroix Geology presentation
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Transcript of Neal Lacroix Geology presentation
![Page 1: Neal Lacroix Geology presentation](https://reader034.fdocuments.us/reader034/viewer/2022042623/5408d4998d7f7267058b45b8/html5/thumbnails/1.jpg)
Death Valley
Photo by Neal Lacroix
![Page 2: Neal Lacroix Geology presentation](https://reader034.fdocuments.us/reader034/viewer/2022042623/5408d4998d7f7267058b45b8/html5/thumbnails/2.jpg)
History● Death Valley is actually a graben● A graben is a depressed block of
land bordered by parallel faults● Oldest rocks are extensively
metamorphosed and at least 1.7 billion years old
● Death Valley is the hottest and driest place in North America
● On July 10. 1913 the hottest temperature on earth was recorded in Death Valley, 134* F
● Annual average rainfall is 1.5 inches
USGS
![Page 3: Neal Lacroix Geology presentation](https://reader034.fdocuments.us/reader034/viewer/2022042623/5408d4998d7f7267058b45b8/html5/thumbnails/3.jpg)
Geology● Salt Pan● Covers more than 200
square miles● Forty miles long● More than five miles wide
Photo by Neal Lacroix
![Page 4: Neal Lacroix Geology presentation](https://reader034.fdocuments.us/reader034/viewer/2022042623/5408d4998d7f7267058b45b8/html5/thumbnails/4.jpg)
Plants● Prickly pear● Opuntia Polycantha● Desert flowering succulent● Conservation status-secure● Joshua tree● Yucca brevafolia● Native to the southwestern
United States● Consevation status-could be
threatened by climate change
Photos by Neal Lacroix
![Page 5: Neal Lacroix Geology presentation](https://reader034.fdocuments.us/reader034/viewer/2022042623/5408d4998d7f7267058b45b8/html5/thumbnails/5.jpg)
Animals● Great-tailed Grackle● Quiscalus mexicanus● Native to North and South
America● Medium size passerine bird
Photo by Neal Lacroix
![Page 6: Neal Lacroix Geology presentation](https://reader034.fdocuments.us/reader034/viewer/2022042623/5408d4998d7f7267058b45b8/html5/thumbnails/6.jpg)
Rock 1● Shale● Sedimentary rock● Coated with sand and fused
together
Photo by Neal Lacroix
![Page 7: Neal Lacroix Geology presentation](https://reader034.fdocuments.us/reader034/viewer/2022042623/5408d4998d7f7267058b45b8/html5/thumbnails/7.jpg)
Rock 2● Sandstone● Sedimentary ● Carved with lines of an
unknown nature
Photo by Neal Lacroix
![Page 8: Neal Lacroix Geology presentation](https://reader034.fdocuments.us/reader034/viewer/2022042623/5408d4998d7f7267058b45b8/html5/thumbnails/8.jpg)
Rock 3● Igneous rock● Basalt with quartz streaks
Photo by Neal Lacroix
![Page 9: Neal Lacroix Geology presentation](https://reader034.fdocuments.us/reader034/viewer/2022042623/5408d4998d7f7267058b45b8/html5/thumbnails/9.jpg)
Rock 4● Layered sedimentary rock
Photo by Neal Lacroix
![Page 10: Neal Lacroix Geology presentation](https://reader034.fdocuments.us/reader034/viewer/2022042623/5408d4998d7f7267058b45b8/html5/thumbnails/10.jpg)
Rock 5● Sand dunes● The sand dunes are
comprised of very fine particles of silica and other rocks that have been ground up over time by the forces of nature.
Photo by Neal Lacroix
![Page 11: Neal Lacroix Geology presentation](https://reader034.fdocuments.us/reader034/viewer/2022042623/5408d4998d7f7267058b45b8/html5/thumbnails/11.jpg)
Changes 1● Over the course of millions of
years these rocks were moved to a vertical position and then formed into a curve by the extreme forces of nature.
Photo by Neal Lacroix
![Page 12: Neal Lacroix Geology presentation](https://reader034.fdocuments.us/reader034/viewer/2022042623/5408d4998d7f7267058b45b8/html5/thumbnails/12.jpg)
Changes 2● The plants had to adapt to
the lack of water. They did this by sending roots deep into the earth or by spreading out a vast network of roots that were shallow in depth.
Photo by Neal Lacroix
![Page 13: Neal Lacroix Geology presentation](https://reader034.fdocuments.us/reader034/viewer/2022042623/5408d4998d7f7267058b45b8/html5/thumbnails/13.jpg)
Changes 3● Sand bee● These small bees burrow into
the sand dunes to create a home
● They appear to be the sole resident of the hole
● This is most likely an adaptation to escape the oppressive summer heat in Death Valley
Photo by Neal Lacroix
![Page 14: Neal Lacroix Geology presentation](https://reader034.fdocuments.us/reader034/viewer/2022042623/5408d4998d7f7267058b45b8/html5/thumbnails/14.jpg)
References● Retrieved from Wikipedia:
http://www.en.wikipedia.org/wiki/graben● Retrieved from National Park Service:
http://www.nps.gov/deva/naturescience/cacti.htm● Retrieved from The Cornell Lab of Ornithology:
http://www.allaboutbirds.org/guide/great-tailed_grackle/id ● Retrieved from Wikipedia:
http://www.en.wikipedia.org/wiki/Death_Valley_National_Park● All photographs taken by Neal Lacroix