ASSESSMENT COMPONENT: FIELDWORK

Transcription

1 STAGE 2 GEOLOGY ASSESSMENT EXEMPLAR ASSESSMENT COMPONENT: FIELDWORK LEARNING OUTCOMES: 1, 3, 4,, 8, 9 TOTAL : 100 EXCURSION TO MANNUM QUARRY AND REEDY CREEK Aims of Excursion: To observe, at Mannum Quarry, features of igneous intrusions together with weathering processes occurring in igneous rocks. To deduce the geological history of Mannum Quarry from the visible cross-section. To observe the diversity of Tertiary marine life in this region, as exemplified by the fossils in the sedimentary rocks of the Murray Valley. To compare the characteristics of a high-energy river (Reedy Creek) with the low energy features shown by the River Murray at Mannum. To study the Reedy Creek Granodiorite, and to examine its contact zone with the Kanmantoo Migmatite. Summative Work Total Marks: 100 Three items of summative work will be required from this excursion. They are: 1 field notebook; 2 collection of sketches or photographs of rocks and fossils; 3 written report. Guidelines For Preparation Of Field Report 1. Field Notebook Look around Mannum Quarry, in groups of two or three, and locate and describe most of the geological features. These should be identifiable from examples presented in class. Unfamiliar features will be identified and explained. Stick the shaded box on page 2 into your field notebook before the excursion. Walk all around the Mannum Quarry, and climb to the top. Walk around the quarry, look for the features listed in the shaded box, and tick off each one as you find it. All features at Reedy Creek will be explained to you. You will be required to make a sketch map showing selected features of the Waterfalls area. Your field notebook will be collected for marking when we board the bus for our return to Adelaide. SSABSA Support Materials: 2gly-ae-reedy.doc, last updated 6 January 2004 page 1 of

2 Stick this sheet into your field notebook Features Of Mannum Quarry Make a labelled sketch showing a cross-section of the quarry, so that you can refer to the location of each feature you describe. Take a photograph showing general view of the quarry, from which you can determine its geological history. Sketch the dolerite dyke. Sketch a close-up view of the boundary between dyke and granite. Record the mineralogy of the granite. Sketch fine-grained and coarse-grained granite. Sketch examples of fresh, partially assimilated and almost completely assimilated xenoliths. Sketch the line of xenoliths across the quarry face. Identify in a sketch the location of Mannum Formation (fossiliferous layer above the granite). Identify in a sketch the location of Kunkar (or calcrete). Record evidence that the area was once a high energy coastal environment. Sketch and label onion-skin weathering in the granite. Sketch and label granite tors. Sketch and label spheroidal weathering. SSABSA Support Materials: 2gly-ae-reedy.doc, last updated 6 January 2004 page 2 of

3 Stick this marks scheme into your field notebook Mannum Quarry and Reedy Creek Excursion DATE... Field Notebook Marks Scheme CRITERION ACTIVITY MAX: Participate effectively in field activities. 1 Make appropriate observations of geological phenomena. Maintain appropriate records of observations. Use geological map notation correctly Collect and record the information listed on the page labelled features of Mannum Quarry. Record observations from Reedy Creek. Refer to photographs taken and specimens collected. Make a sketch map showing the rock types and features at the Reedy Creek boundary. 7 3 GAINED Discuss and explain concepts, models and theories. State two explanations for the formation of the black rock at the southern end of the quarry. 4 TOTAL 1 COMMENTS SSABSA Support Materials: 2gly-ae-reedy.doc, last updated 6 January 2004 page 3 of

4 2. Records of Rocks and Fossils During the Excursion: Every group of two or three students must photograph or sketch unweathered specimens of 4 different rock types from Mannum Quarry, and 2 different rock types from Reedy Creek. Describe the location from which it was collected. From the limestone quarry, sketch as many different fossils as you can find. Back at School The group must prepare two posters one of rocks and the other of fossils sketched or photographed. Your displays of rock sketches should contain the following information: Where and when the specimens were sketched, and by whom. The name of each fossil type, using the chart supplied. The name of each rock type, its age and whether it is igneous, sedimentary or metamorphic. A brief explanation of its formation. A sketch showing its texture and mineralogy. 3. Field Report The layout of your field report is not prescribed, but you must cover all the points in the REPORT TASKS column of the Marks Scheme. Use side headings where appropriate. Include the attached maps and diagrams at the relevant places in your report. References For Interpretations and Geological History 1. Alderman A. R., Southern Aspect p 87. [9.42 ALD] 2. Talbot J. L., & Nesbitt R. W., Geological Excursions in The Mount Lofty Ranges and the Fleurieu Peninsula - pp 46 to 0. [9.42 ral] 3. Corbett D., Geology and Scenery of South Australia Wakefield Press p 22. [0.423 COR] 4. Whiting, D., A Visitor Guide To The Ecology of The Granite Quarry at Mannum S.A.C.A.E. Salisbury [in vertical file]. The University of Adelaide Department of Adult Education, The Palmer-Reedy Creek-Mannum District of South Australia [in vertical file] NB Extract the relevant information, and write it in your own words. SSABSA Support Materials: 2gly-ae-reedy.doc, last updated 6 January 2004 page 4 of

5 Field Report Marks Scheme Attach this marks scheme to your report when you hand it in. CRITERIA REPORT TASKS MAX: GAINED Extract information from a cross-section. Develop a discussion or argument in a logical and sequential manner. Justify conclusions. Extract relevant information from a variety of resources. Critically analyse and interpret data. Explain geological phenomena and processes. Use geological map notation correctly Select appropriate techniques for obtaining information. Record the sources of information obtained. Use geological terms correctly. Express ideas simply, clearly and accurately. Indicate on a cross-section of Mannum Quarry the locations of features described. Describe the geological history of Mannum Quarry as shown by the visible cross-section. Describe the evidence for the geological history you have described. Use your photographs and the information in your field notebook to describe the geological features seen on the excursion. Describe and explain the formation of features seen on the excursion. Include your sketch map showing rock types and features at the Reedy Creek boundary. Use references to describe the geological history of the Reedy Creek area (2 MQ 10 RC) 24 (16 MQ 8 RC) Bibliography (correctly set out). 1 Overall presentation of work, including introduction, conclusion, title & contents pages, use of spell-check, folder etc. TOTAL 100 COMMENTS Prepared by Cynthia Pyle and the Subject Advisory Committee. Copyright SSABSA SSABSA Support Materials: 2gly-ae-reedy.doc, last updated 6 January 2004 page of