These cliff rocks form the coastal cliffs of Victoria vary greatly in size, geology, age and stability. The sheer cliffs are a prominent coastal feature of Anglesea, in the south-west of Victoria, rising from the mouth of the Anglesea river to a maximum height near grinders point they then fall to a low near black rock. Facing North East you will be looking towards the Tall Cliffs which are exposing Sedimentary rock of the Tertiary age which are around 45 Million years old.
The association with Melbourne’s transport history is based on the top of this tall cliff containing the mineral jarosite which was mined in the 1920s to produce red oxide pigment, use to paint the carriages of Melbourne’s historic trams, the ‘red rattlers’.
Nearby is a display board which provides some information about the Tall Cliffs which may help your answer for the following questions, however here is some additional information about sedimentary rocks.
• Sedimentary rocks are formed by sediment that is deposited over time, usually as layers at the bottom of lakes and oceans
• This sediment can include minerals, small pieces of plants and other organic matter.
• The sediment is compressed over a long period of time before consolidating into solid layers of rock.
• Sedimentary rocks forms layers called strata which can often be seen in exposed cliffs.
• Sedimentary rocks cover the majority of the Earth's rocky surface but only make up a small percentage of the Earth’s crust compared to metamorphic and igneous types of rocks.
• Examples of sedimentary rocks include limestone, sandstone, mudstone, shales, basalt, coal, greywacke, chalk, claystone and flint.
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The Questions:
1: What are the 5 sediments of the sedimentary rock.
2: How were these sediments laid down,
3: What do you estimate the height of the Tall Cliffs to be at its lowest and its highest.
4: What colours do you see in the Tall Cliffs, and how have these colors formed
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We hope you will enjoy our earth cache and the views.
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The Coffee’s