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TABLE ROCK STATE PARK Table Rock State Park 158 E. Ellison Lane Pickens, SC 29671 (864) 878-9813 Table Rock We invite you and your students to visit our park and participate in an educational program. Table Rock State Park is a landmark site that includes a vast diversity of plant and animal life, varied stream systems, and mountain geology. We encourage you to experience the park by participating in one of the following Discover Carolina programs. Pre-site, onsite and post-site lesson plans have been developed to ensure a quality educational experience for you and your students. Directions From I - 385: Take exit 40A onto Hwy 291 N and drive 1.5 mi. Bear to the left onto Wade Hampton Blvd/Hwy 29/Hwy 291. Continue for 3 mi. At the sixth red light bear to the rt onto Hwy 276. Continue for 11 mi. Turn left onto Hwy 288 and drive 9 mi. Turn right at intersection of Hwy 288 and Hwy 8. Continue 5 mi to Hwy 11, then turn left. Continue on Hwy 11 for 3 miles to Table Rock State Park. The Park Headquarters will be at Ellison Lane which will be the first entrance to your left when you reach the park. Reservations and Program Information For reservations, contact: Scott Stegenga Park Interpreter Phone: (864) 878-9813 [email protected] 93 Table Rock State Park: Pre-Site Content Area: Science Table Rock: Pre-Site Grade Level: 8 Time to Complete: 45 minutes Title of Program: Patterns in the Rocks South Carolina State Standards Addressed Scientific Inquiry 8-1.1 Design a controlled scientific investigation 8-1.2 Recognize the importance of s systematic process for safely and accurately conducting investigations. 8-1.3 Construct explanations and conclusions from interpretations of data obtained during a controlled scientific investigation. 8-1.4 Generate questions for further study on the basis of prior investigations. 8-1.5 Explain the importance of and requirements for replication of scientific investigations. 8-1.6 Use appropriate tools and instruments. 8-1.7 Use appropriate safety procedures when conducting investigations. Earth Science Earth’s Structure and Processes 8-3.7 Illustrate the creation and changing of landforms that haveoccurred through geologic processes 94 (including volcanic eruptions and mountain-building forces). 8-3.9 Identify and illustrate geologic features of South Carolina and other regions of the world through the use of imagery (including aerial photography and satellite imagery) and topographic maps. Program Description Students will use a topographic map and an infrared map to trace the pattern created by several streams in the area of Table Rock State Park. Using a protractor, they will measure the angles of the changes the stream makes in its path. They will generate a hypothesis to explain unusual stream patterns. Focus Questions For Students How are different size streams portrayed on a topographic map? How does an area devoid of vegetation, such as rock faces, appear on an infrared map? What factors affect the angle at which a stream bends? How can you measure stream bend angles with a protractor? Culminating Assessment Use the Table Rock Lithograph to test the hypothesis generated in the stream bend activity by determining the angles of intersection of the rocks of Table Rock Mountain and comparing these angles to the angles of the stream pattern. Material/Equipment/Resources • Table Rock Lithograph • Table Rock Topographic Map • Protractor • Wipe-off pen Teacher Preparation Read Background Information and be prepared to explain unique features of topographic and infrared maps. Background Information The Table Rock Topographic Map is based on the USGS 7.5 minute series and has a scale of 1:24,000. Topographic maps use contour lines to show the shape of the earth’s surface. The contour interval is dependent on the relief of the landscape and is commonly 40 feet on Blue Ridge maps. All USGS maps use standard symbols; hydrographic features such as lakes and rivers are shown in blue. Many of the creeks in the Table Rock area make repeated nearright angle bends. This unusual pattern is caused by the underlying fracture pattern in the rocks. The infrared photograph was taken during the winter months when deciduous trees are in their leaf-off season. Interpretation of the various intensities of infrared hues, or false colors, yields information about vegetative ground cover, trees, physical geography, pollution problems, and land use. See the chart below for clues for interpreting colors on the Table Rock Lithograph. Interpreting the Table Rock Infrared Image shades of reds = healthy vegetation bright red = winter crops (rye, oats, wheat) For more information refer to the background information from the SC MAPS Teaching Manual, 2000 Edition, pages 4044 or read any upper level earth science textbook. Background Information 1. Arrange students in groups of 3 or 4. 2. On the Table Rock Topographic Map locate Little Table Rock Creek. Use a wipe-off pen to make a mark at its headwaters near Grunting Spring gap and its terminus at Table Rock Reservoir. **Note that little Table Rock Creek watershed displays a typical dendritic drainage pattern. Every stream will tend to have this same pattern unless there is some underlying geologic structure that affects the direction of stream flow, generating a different pattern. 3. Next, use a protractor to measure the angles formed by the first five bends in 4. this creek. Record you data in Table 1, below. Now locate the South Saluda River. Make a mark where this stream enters Table Rock Reservoir and its farthest point from that body of water. 5. Starting at the reservoir, use the protractor to measure the angles formed by five of the bends in this stream. Record your data in Table 2, below. Finally, locate Green Creek near the bold words “Table Rock State Park”, which is the area you will be hiking on your field trip. Make a mark where this stream enters Pinnacle Lake and its farthest point from that body of water. 6. Starting at the lake, use the protractor to measure the angles formed by five bends in this creek. Record your data in Table Rock: Pre-Site Look over the Table Rock Topographic Map and the Table Rock Lithograph to be sure you can locate all map features mentioned in this activity, and that you can demonstrate how to use a protractor to measure angles of stream course changes. Be sure to measure the stream bend as the amount it deviated from a straight course. dark red = evergreen trees (pines, conifers) bluish-gray = dormant vegetation (deciduous trees: hickory, oak, maple) light blue = developed areas (cities, quarries, paved areas) white = barren areas (rock exposures, cliffs) 95 Table Rock: Pre-Site 1. Table 2, below. 2. Now compare your data on stream angles from Little Table Rock Creek (Table 1) with the stream angles from the other two streams (Table 2). What major differences do you see in the data? 3. Because the streams in Table 2 are not typical there must be some underlying geologic reason for the unusual pattern. Based on what you know about the geology of the Blue Ridge Region, generate a hypothesis to explain the unusual pattern of stream bends. Starting at the lake, use the protractor to measure the angles formed by five bends in this creek. 4. Because the streams in Table 2 are not typical there must be some underlying geologic reason for the unusual pattern. Based on what you know about the geology of the Blue Ridge Region, generate a hypothesis to explain the unusual pattern of stream bends. Vocabulary List Dendritic – default drainage pattern, looks like branches of a tree Drainage pattern – pattern created by paths of streams and their tributaries Infrared lithograph – false color photograph using infrared film and color shifting Structural Control – underlying rock characteristics determine drainage pattern Watershed – all the land area drained by a stream and its tributaries 96 Y COPE! M Table 1 Table Rock: Pre-Site 97 Table Rock State Park: On-Site Content Area: Science Table Rock: On-Site Grade Level: 8 Time to Complete: 70 minutes Title of Program: Common Rocks & Minerals of the Blue Ridge South Carolina State Standards Addressed Scientific Inquiry 8-1.1 Design a controlled scientific investigation 8-1.2 Recognize the importance of s systematic process for safely and accurately conducting investigations. 8-1.3 Construct explanations and conclusions from interpretations of data obtained during a controlled scientific investigation. 8-1.4 Generate questions for further study on the basis of prior investigations. 8-1.5 Explain the importance of and requirements for replication of scientific investigations. 8-1.6 Use appropriate tools and instruments. 8-1.7 Use appropriate safety procedures when conducting investigations. Earth Science Earth’s Structure and Processes 8-3.4 Explain how igneous, metamorphic, and sedimentary rocks are interrelated in the rock cycle. 98 8-3.5 Summarize the importance of minerals, ores, and fossil fuels as Earth resources on the basis of their physical and chemical properties. Program Description Students will examine several minerals commonly found in Blue Ridge rocks identify them using a mineral identification key. They will then correlate these minerals to the major rock types found at Table Rock State Park. Focus Questions For Students How can you tell one mineral from another? Which physical properties are most useful in identifying minerals? Can two different minerals have the exact same set of physical properties? How can you use mineral identification data to classify rocks? Culminating Assessment Students will examine samples of two common rocks from Table Rock State Park. They will identify the main minerals present in each sample and classify each by rock type. Material/Equipment/Resources • Samples of common Table Rock State Park rocks (2) • Samples of common Blue Ridge area minerals (9) • Hand lens (3) • Small glass jar (1) Teacher Preperation Read Background Information and be prepared to describe and discuss the common minerals of the Blue Ridge Region and the main rocks found at Table Rock State Park. Practice using a hand lens and glass jar for testing and identifying selected minerals, applying the key provided. Be prepared to demonstrate how to safely perform the hardness test on the glass jar. Background Information Quartz and feldspar are very common in most Blue Ridge rocks (as in many other rocks as well) and can be differentiated by their hardness (both are harder than glass, but quartz is harder than feldspar), cleavage (feldspar has it, quartz does not), and different crystal appearance. The variety of amphibole called hornblende is an ironrich mineral that dominates one of the two main rock types of the Table Rock area. Its near-black color, cleavage at 56 and 124 degrees, and elongated crystal structure all help to identify it. The mineral augite (pyroxene group) looks very similar to hornblende, but is generally more dark green than black, cleavage angles are 87 and 93 degrees and its crystals are not as elongated. Sheet silicates of the mica group, ironpoor muscovite (light-colored) and iron-rich biotite (dark-colored) are found in some local rocks, most notably schists. Olivine, an olive green to near black mineral that Blue Ridge rocks are composed of various types of igneous and metamorphic rock, especially granite-gneiss and amphibolite, (a very dark banded gneiss with high concentrations of the amphibole mineral hornblende). During metamorphism, preexisting minerals were totally recrystallized by high temperatures and pressures to create a texture very different from that found in the original rock. In addition to being altered by metamorphism, the rock in the Blue Ridge Region has been severely fractured and folded by tectonic activity. In general, the higher elevated section of Table Rock Mountain is mostly granitegneiss and is very resistant to erosion. The lower elevations are generally underlain by the less resistant amphibolite. Vegetation grows more readily on the easily decomposed amphibolite areas. Table Rock: On-Site All minerals have a distinctive set of physical and/or chemical characteristics that can be used to determine their identity. These include (1) hardness – tested by attempting to scratch glass (hardness value 6); (2) cleavage – seen by examination of specimen faces; (3) specific gravity – checked by the heft of a sample; (4) color – good for some but not all; and (5) crystal appearance – the shape of any visible crystals. Several other simple tests may be performed. exhibits no cleavage is rarely seen in local rocks. An iron-rich garnet that forms during metamorphism, and has a distinctive dark color and crystal habit, is also prevalent in rocks of this area. Calcite is the only truly important rock-forming mineral not seen in the area at all. It effervesces in dilute hydrochloric acid and has a distinctive rhombohedral crystal structure. Procedures 1. Arrange students in groups of 2-3. 2. Students should conduct the tests described by the teacher on each minera. Record your information on the worksheet data table like the one below. 3. Compare your results with key provided and determine the name of each sample. 4. Write the mineral name in the last column of the data table. Answer questions 1-7 below. Vocabulary amphibolite—amphibole-rich metamorphic rock 99 cleavage—tendency of a mineral to break along internal planes of weakness feldspar—most common mineral group; all contain aluminum, silicon, and oxygen foliated—layered textural mineral appearance brought about during metamorphism gneiss—highly foliated metamorphic rock, often granite-like in comparison Table Rock: On-Site heft—relative measure of the density or specific gravity of an object 100 nonfoliated—unlayered textural appearance; term applied to metamorphic rocks Common Rocks & Minerals of the Blue Ridge Y COPE! M Table Rock: On-Site 101 Table Rock State Park: On-Site Content Area: Science Table Rock: On-Site Grade Level: 8 Time to Complete: 75 minutes Title of Program: Green Creek Hike South Carolina State Standards Addressed Scientific Inquiry 8-1.1 Design a controlled scientific investigation 8-1.2 Recognize the importance of s systematic process for safely and accurately conducting investigations. 8-1.3 Construct explanations and conclusions from interpretations of data obtained during a controlled scientific investigation. 8-1.4 Generate questions for further study on the basis of prior investigations. 8-1.5 Explain the importance of and requirements for replication of scientific investigations. 8-1.6 Use appropriate tools and instruments. 8-1.7 Use appropriate safety procedures when conducting investigations. Earth Science Earth’s Structure and Processes 8-3.4 Explain how igneous, metamorphic, and sedimentary rocks are interrelated in the rock cycle. 102 8-3.6 Explain how the theory of plate tectonics accounts for the motion of the lithospheric plates, the geologic activities at the plate boundaries, and the changes in landform areas over geologic time. 8-3.7 Illustrate the creation and changing of landforms that have occurred through geologic processes (including volcanic eruptions and mountain-building forces). Program Description Students will hike a section of the trail that parallels Green Creek at Table Rock State Park. They will observe and classify rocks and minerals, estimate stream bend angles, and observe folds and igneous intrusions. Focus Questions For Students How do fractures in rocks affect changes in stream course? Can soil color changes be used to indicate changes in parent rock material? Which minerals appear as large crystals in Blue Ridge rocks? What rock type would you expect to find in a typical folded mountain region? Culminating Assessment Have students identify one feature along the Green Creek hike that could be used as an extra stop on the field trip and explain how it was formed and why it is interesting to them. Material/Equipment/Resources None required. Teacher Preperation Read Background Information and be prepared to discuss mineral identification, metamorphism, and metamorphic rocks. Background Information For further information, read the background information from the SC MAPS Teaching Manual, 2000 Edition, Characteristic Landforms of the Blue Ridge (page 2-2), Rationale (page 2A-1) and Introduction (page 2A-2). Procedures Inform students about safety precautions for hiking the trail. Stops 1. Large rock by lake channel - Example of a metamorphic rock. These rocks are formed by heat and pressure. Contact – volcanic activity. Regional – force, shifting plates. Rock layered appearance – foliation, peeling is exfoliation. Talk about rock cycles. 2. First few rocks along road – Two main rock types at TR. Granite gneiss – lighter, more resistant to weathering, contains quartz & feldspar. Amphibolite – darker, less resistant to weathering, contains amphibole & iron. Weathered garnets seen within rock. 3. Last few rocks along road – Intrusion seen in rock is not parallel with folia- Table Rock: On-Site The Carrick Creek Trail is a lasso-shaped, park maintained trail, which starts near the parking lot at Pinnacle Lake and winds up and down as it crisscrosses Carrick Creek. The trail to the top of Table Rock follows a portion of Green Creek which joins Carrick Creek from the east. Multiple examples of metamorphic rocks and their associated minerals, near-right angle stream bends, and soil color changes occur along this trail. The rocks in this area consist of two main types, a resistant granitic gneiss and a less resistant amphibolite gneiss. tion. The intrusion occurred later. Rock with large crystals of feldspar and quartz. Feldspar shows cleavage and weathers into clay. Larger crystals take more time to form. 4. Rock by drinking fountain at trail head – Shows foliation and exfoliation well. Smaller rock across from kiosk shows feldspar crystals – largest mineral group. 5. Waterfall & pool – Waterfalls can occur due to less resistant rock being weathered away causing drop offs. Evidence of rock layers and folding in rocks to right of pool. Folding occurs deep below the surface. Rock is uplifted to the surface then weathered. Same process of pressure causes metamorphic rocks to form. 6. Large outcrop in stream – Rock in bank across stream shows flat surfaces where fractured. 90 degree bends can be seen in stream. Rock pieces broken off at top shelf of small waterfall is due to water weakening the rock. 7. Upstream about 50 ft. – Examples of rocks in and along stream with near 90 degree angles. 8. Footbridge – Rocks here have common linear patterns. Running water started to wear rock away in crevices and continued until the present day “needle” of rock was formed. More 90 degree bends in stream are evident by bridge. 9. Log cut out of trail before short bridge – Fallen logs are only removed where the trail tread is so the rest of the log can decompose as it is. Decomposition of organic matter is much faster that inorganic material. Rocks produce sand and clay, organic matter produce humus. 10.(Optional) Rock at far end of footbridge at left corner – Example of micaceous schist. Evidence of gold-like color of mica. This rock is less common at TR. It is less metamorphosed than gneiss so it is less resistant to weathering. 11.Orange colored soil – Very obvious 103 Table Rock: On-Site 1. along trail and at bases of uprooted trees right after sharp turn to left. Evidence of underlying iron-rich amphibolite rock that has weathered into iron oxide clay. 2. Rocks along bank to the right of trail – Near 90 degree fracture angles can be seen. This is due to internal composition of minerals. Rock shelf to the right shows an example of biomechanical weathering where a tree root applied force to widen a fracture. 3. (Optional) Large white crystals in rocks - Seen in rocks along section of steps. Good examples of feldspar. Smaller loose pieces can also be found in the trail. 4. Large rock on right broke in two pieces – Shows fracture with right angled edges. Rock has slid down bank. 5. Soil color change on left – In area where tree has fallen, soil color is more of a tan color now. This shows a change in underlying rock. More granite gneiss and less amphibolite. 6. Overhanging rocks on right – Overhanging outcrop provides habitat for mosses, lampshade spiders, green salamanders (endangered species), mud dabbers, occasional phoebe nests, crickets, rodents, etc. Just past the overhang the exposed rocks show 3-D pattern of fractures and some folding near the bottom. 7. Footbridge – Small 90 degree stream bends evident here. Intrusions seen in stream bedrock. Rusty stains on creek rocks evidence of amphibolite. Vocabulary Amphibolite – dark-colored metamorphic rock containing lots of iron-rich amphibole Foliation – parallel alignment of mineral crystals found in some metamorphic rocks Fractures – breaks in a rock along which movement has not occurred 104 Granitic gneiss – light-colored metamorphic rock with composition similar to granite Micaceous schist – metamorphic rock with fine foliation, much muscovite mica present existing crystal undergoes partial melting and physically changes to a new crystal, possibly of a different mineral. Table Rock State Park: Post-Site Content Area: Science Grade Level: 8 Time to Complete: 45 minutes Title of Program: Making a Metamorphic Rock South Carolina State Standards Addressed Scientific Inquiry 8-1.1 Design a controlled scientific investigation 8-1.2 Recognize the importance of s systematic process for safely and accurately conducting investigations. 8-1.3 Construct explanations and conclusions from interpretations of data obtained during a controlled scientific investigation. 8-1.4 Generate questions for further study on the basis of prior investigations. 8-1.5 Explain the importance of and requirements for replication of scientific investigations. 8-1.6 Use appropriate tools and instruments. 8-1.7 Use appropriate safety procedures when conducting investigations. Earth Science Earth’s Structure and Processes 8-3.4 Explain how igneous, metamorphic, and sedimentary rocks are interrelated in the rock cycle. Program Description Students will perform a hands-on activity making a foliated metamorphic rock. Focus Questions For Students What causes foliation? What causes recrystallization? Can the mineral composition of a rock change during metamorphism? Culminating Assessment Table Rock: Post-Site 8-3.6 Explain how the theory of plate tectonics accounts for the motion of the lithospheric plates, the geologic activities at the plate boundaries, and the changes in landform areas over geologic time. 8-3.7 Illustrate the creation and changing of landforms that have occurred through geologic processes (including volcanic eruptions and mountain-building forces). Have students write a short story describing the history of a granitic rock that experienced metamorphism. Material/Equipment/Resources • • • • • Oatmeal (8 tablespoons) Chocolate chips (15-20) Paper cups (2 small, 1 larger) Hot water Scissors Teacher Preperation Read background information and be prepared to answer questions about the processes that cause metamorphism and foliation. 105 Safety caution! Test your hot water temperature. It is being used to melt chocolate and should NOT be scalding hot. (Maximum temperature = 120 degrees F—Do NOT exceed.) If you wish to make edible rocks, try toasting the oatmeal ahead of time and adding some brown sugar to your recipe. Table Rock: Post-Site Background Information Blue Ridge rocks are composed of various types of igneous and metamorphic rock, especially granite-gneiss and amphibolite. Many of the rocks that form the Blue Ridge Mountains started out deep underground as large igneous intrusions of granite that were eventually uplifted and metamorphosed. During this metamorphism, high temperature and pressure totally recrystallized the original minerals. The dominant minerals now present in the rock in this area are quartz and feldspar (light color) and amphibole (dark color). Oatmeal and chocolate chips can be metamorphosed too. By applying pressure, the oatmeal grains will move into a parallel alignment (foliation) and by applying heat, the chocolate chips will melt first then later cool and harden, (recrystallize). Procedures 1. Divide into groups of three or four. 2. Place half your oatmeal and 1 tablespoon of water into a paper cup. Notice the random nature of the oatmeal flakes. 3. Add your chocolate chips and cover with the rest of your oatmeal. Add another tablespoon of water. 4. Now carefully place another paper cup into the one you have filled with ingredients. Slowly but steadily, push down on the second cup for thirty seconds. 5. Next, take your rock mix and place it carefully in a cup of hot water for one minute. Don’t let the water level rise 106 above the lip of the cup and overflow into the oatmeal mix. 6. Remove the cups form the water, let your “rock” cool for one minute, then carefully cut away the paper cup and examine your creation. 7. Answer the questions below. Questions About Metamorphism 1. How did the arrangement of the oatmeal flakes change after you pushed on them? 2. How did the appearance of the chocolate chips change after they were heated and cooled? 3. What two main things happen during metamorphism that causes change in rocks? 4. In your rock, what mineral might the chocolate chips resemble (from the field trip)? Be prepared to explain why you chose this mineral. 5. Classify your ‘rock’ using geologic terms. Vocabulary Foliation—the parallel alignment of minerals within a metamorphic rock Metamorphism—change caused to an existing rock by heat, pressure, and fluid activity. Recrystallization—the process where an existing crystal undergoes partial melting and physically changes to a new crystal, possibly of a different mineral.