What is cross-section geology?
What is cross-section geology?
A geological cross-section is a graphic representation of the intersection of the geological bodies in the subsurface with a vertical plane of a certain orientation. It is an approximate model of the real distribution of the rocks in depth, consistent with the information available on the surface and the subsurface.
What is cross-section map?
Cross-sectional maps show a side-view of a segment line drawn on a topographic map. A cross-section helps see how the terrain lies. Structural maps include features such as the type of rocks and geologic structures that are in an area.
Why are cross-sections important?
Cross-sections are important tools that aid in the interpretation and presentation of geological data, however; they provide only a two-dimensional picture and must be interpreted accordingly. They are most effectively used in conjunction with other illustrative techniques.
How do you create a cross-section?
Making a Cross-Section
- Take a thin strip of paper and place it along the cross-section line.
- Take that strip of paper and put it on a fresh piece of paper.
- Draw dots corresponding to the elevations along the strip of paper representing the cross-section line.
- Draw a smooth line connecting the dots.
Why are cross sections important?
How do geologic maps and cross sections differ?
A geologic map uses lines, symbols, and colors, to include information about the nature and distribution of rock units within an area. A geologic cross-section shows geologic features from the side view.
What is a cross section of a river?
A cross profile shows a cross-section of a river’s channel and valley at a certain point along the river’s course. A – as the river flows downhill there is an increase in vertical erosion . The channel is shallow and narrow because there is not a lot of water in the channel. The channel is at its widest and deepest.
What does geologic cross section mean?
geologic cross-section An interpretation of a vertical section through the Earth’s surface, most usefully a profile, for which evidence was obtained by geologic and geophysical techniques or from a geologic map.
What’s a cross section in geography?
Cross sections are line graphs that show a sideways view of a landscape. They can show features such as hills and valleys, or depths, such as the depth of a river. Cross sections of hills use contour lines to determine the height of the land.
What is the cross section in geometry?
In geometry the correct definition of cross section is: the intersection of a body in 2-dimensional space with a line, or of a body in 3-dimensional space with a plane.
What is cross – cutting relationship in geology?
Cross-cutting relationships. Cross-cutting relationships is a principle of geology that states that the geologic feature which cuts another is the younger of the two features. It is a relative dating technique in geology. It was first developed by Danish geological pioneer Nicholas Steno in Dissertationis prodromus (1669)…
