This ‘Cross Section Map’ represents a generalised overview of the most significant features and discoveries known within the Earth’s crustal layer, revealing a selective range of extreme, significant geological processes, and non-exploitative anthropogenic activities. Where non natural features are identified, careful emphasis has been placed on the positive, explorative aspects, avoiding as much as possible the exploitative economical examples, often cited (for example, oil fields). The overall result should reveal the most positive points of energy found on and within the crustal layer of our planet, in such a way that communicates fluently and effectively
During my time in Loughborough I have spent a number of days at the British Geological Survey in Keyworth, Nottinghamshire. I was interested in gaining a visual representation of the layers that exist beneath the earth’s surface from core to exosphere. Here she worked with Clive Cartwright and some of the questions that she posed are answered below.
1. What are the distinguishing features of a ‘cross section’ map in relation to other kinds of map?
Generally, maps tend to reveal spatial features either perpendicular to the planet’s surface or at an angle (offnadir). A ‘Cross Section’ is quite different, in so far as the features illustrated below surface level are visualized in the method of a generalized profile’. The overall effect is quite similar to a side view of a slice of cake, or more in my case, a sliced ‘Scotch egg’.
2. Are cross section maps common in cartography?Not really. Cross sections are only necessary if the theme of the map is based on data below the surface area,
i.e., Geological maps, Archaeological Sections, etc ….
3. With the map you have worked on with me, could you explain what it shows us about the energy beneath the earth’s surface as well as the topography of the highest and deepest points of the crust.This section map is highly subjective. There appears to be a primal fascination to subjects such as mountains, volcanoes, gold, silver, etc … and communicating these themes in a clear colourful manner hopefully helps the observer engage with my map to full effect.
4. How much do we know about the inner planet? How much of it is known to geologists?
As geology is not my field, it is difficult to give justification to this question, however, from what I’m aware, very little is known about the planet below the Earth’s crust. The deepest solid known examples are reliably identified through surface outcrops where the earth’s surface has pushed up old ocean beds (ophiolites) containing material from our upper mantle. It’s this rock that provides the geologist a special insight into the rock composition of the Earth at such depths. Examples can be found at The Troodos Mountains, Cyprus. Remote sensing tools also help to identify densities below the Earth’s surface, such as seismic recording, revealing varying wave transmission properties through the whole body of the Earth. The study of asteroids (material debris from space) help add to our knowledge, providing potential insights into the inner Earth’s chemical composition, to some degree, albeit from another source.