C this lahar was moderate in size but traveled a

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________________________________________________________________________________________ ________________________________________________________________________________________ c. This lahar was moderate in size, but traveled a considerable distance. There was enough force in the lahar to destroy the bridge on Highway 49 (placemarked). How far did the lahar travel before destroying the bridge? Hint : Use the Ruler tool and select Path. Start at the peak and measure the stream path by following the channel as closely as you can. _____________________________ Kilometers d. Lahars are a mix of water, ash, mud, and debris. On a volcano such as Ruapehu, where does the water come from? __________________________________________________________________________________
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Lab #7: Geologic Hazards of Whatcom County 105 2. Go to Canvas and open Lab7_3-2_MSHLahars.kmz and Lab7_3-2_MSHLavas.kmz . a. How does a lahar deposit differ from a lava flow in terms of shape and size? ________________________ ________________________________________________________________________________________ b. Which do you think moves faster, a lava flow or a lahar? Why? ________________________________ ________________________________________________________________________________________ c. Trace the lahar deposits as far as you can. Where do these lahars terminate? _________________________ ________________________________________________________________________________________ d. Use the Ruler tool to measure how far these lahars travelled. _____________________ Kilometers 3. Go to Canvas and open Lab7_3-3_Orting.kmz . Look at the area surrounding the town of Orting. Notice that both rivers pass Orting, joining into one river a few miles downstream (north) along highway 162. a. Trace both rivers upstream back to their source. Which mountain do the two rivers originate from? _____ ________________________________________________________________________________________ b. If that mountain were to erupt, what would happen to the town of Orting? ___________________________ ________________________________________________________________________________________ c. Based on your answer to the previous question, what is the lahar risk level for Orting: low, moderate, or high (circle one)? Explain. ______________________________________________________________________ ________________________________________________________________________________________ 4. Go to Canvas and open Lab7_3-4_Carbonado.kmz . Look at the town of Carbonado, WA, which is upstream along the Carbon River that flows through Orting. a. Is Carbonado further or closer to Mt. Rainier than Orting? _______________________________________ b. Is Carbonado higher or lower elevation than Orting? ____________________________________________ c. What is the lahar risk level for Carbonado: low, moderate, or high (circle one)? Explain. ______________ ________________________________________________________________________________________ ________________________________________________________________________________________ 5. Go to Canvas and open Lab7_3-5_MtBaker.kmz . Examine the area around the volcano. a. If an eruption of Mt. Baker generated a lahar on the northern or western slopes of the mountain, what major highway would the lahar likely damage? _______________________________________________________ b. In which direction would a lahar have to travel to reach Baker Lake? ______________________________ c. If a large lahar were to flow into Baker Lake, what two secondary hazards might exist? Hint : Be sure to examine the south end of Baker Lake. ___________________________________________ ________________________________________________________________________________________ ________________________________________________________________________________________ d. Go to Canvas and open Lab7_3-5_WhatcomCities.kmz . Assess the lahar risk for each of the cities below (high, moderate, or low) and explain your reasoning. Risk level Reasoning Bellingham: ____________ ______________________________________________________ Ferndale: ____________ ______________________________________________________ Mt. Vernon: ____________ ______________________________________________________ Hamilton: ____________ ______________________________________________________
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Lab #7: Geologic Hazards of Whatcom County 106
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Lab #8: Geology of Washington 107 Lab #8: Geology of Washington Objectives: 1) Learn about the geologic history of Washington State. 2) Understand how various geologic formation amalgamate. Materials Pencil (no pens) Textbook Prelab work (to be completed before lab begins) Pre-lab activity below In-Class Activities (due by the end of lab today, requires a TA check) Activity 1: Geologic time Activity 2: Washington in cross-section Activity 3: Rocks of Washington Homework Activities (due the beginning of next lab) Activities on page 116 Pre-Lab Activity: Key Events in Washington’s Geologic History The activity below replaces this week’s WarmUp Quiz and ConcepTest. In order to receive credit, this
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