a trip to angora falls
TRANSCRIPT
A Trip to Angora Falls
Field assignment by Jessica Martinez
The Lake Tahoe Basin
The Lake Tahoe Basin
• Started its creation approximately 230 million years ago
• The North American plate collided with the Pacific Plate, which slid under the North American plate (subduction)
• Subduction created the uplift of the Sierra Nevadas• About 25 million years ago volcanic activity and
faults were a result of the plates sliding past one another (shaped the basin)
Quinn 2006 p32
Fallen Leaf Lake
Angora Ridge
The Formation of Fallen Leaf and The Angora Ridge
• Products of glaciation• Last know glacier of the area was about 8,000
years ago• Glaciers deposit sediment or moraines on the
outside of the bend (as do rivers)• Angora Ridge is an example of a medial
moraineQuinn 2006 p32
Snow Plant (sarcodes sanguinea) • Myco-hetrotrophic• Derives from underground
fungi associated with adjacent trees
• Evolves from mutualistic autotrophic mycorrhizal plants
Snow Plant continued
• Evolutionary mutations allowed them to stop producing photosynthesis
• Can survive solely on underground fungi • Survives on selected fungi, may die from host
jumping• Evolved over 40 times within plant lineageMerckx 2009
Mullein (verbascum thapsus)• Of figwort family• Grows and spreads from
native environment to new introduced environments
• Adaption to new environments allows the weeds to grow fast and better defend its self
Kumschich, 2013
Metamorphic rock
• Slate• Smooth texture caused by
pressure and heat of magma
• Minerals are arranged in planes
• Forces have deformed it over time
Igneous rock
• Granite• Phaneritic texture
indicates slower cooling in plutons
• Dark fragments indicate inclusions
• Magma melted parts of rock
references
• Kumschick, S., Hufbauer, R. A., Alba, C., Blumenthal, D. M., & Prentice, H. C. (2013). Evolution of fast-growing and more resistant phenotypes in introduced common mullein ( Verbascum thapsus). Journal Of Ecology,101(2), 378-387. doi:10.1111/1365-2745.12044
• Marckx, Vincent 2009 http://aob.oxfordjournals.org/content/104/7/1255.full
continued
• Quinn, Charles, A Nature Guide to the Southwest Basin. 2006 http://books.google.com/books?id=r2N51B-EApAC&dq=fuzzy+leaf+plants+in+lake+tahoe