Question 1         A Brunton compass is more than just a compass

A Brunton compass is more than just a compass.  Surveyors and geologists use it to

In this view of the face of the compass the red arrow shows the strike of a layer of sandstone.  What is that direction?

Two possible dip directions are possible based on the image in the previous question.  They are:

From these images, what is the dip angle of these sandstone strata?

What is the direction of strike of the pink (with brick pattern) bed in this diagram?  Notice the N (for North) on the left side of the diagram.

Using the same diagram as above, what is the direction of the dip of the aqua bed (with the black dots)?

This is a map view of a group of horizontally deposited beds.  Layer A is the youngest.  What of the following choices is a correct interpretation of this map?

This is another map view of a series of rocks, but in this diagram, they are not horizontal.  The attitude of the beds is represented by the black strike and dip symbols.  The surface on which this pattern is found is flat.  It was not flat when it formed, but, after millions of years of erosion, it is now essentially flat.  If the youngest rock in the diagram is the dark purple in the center, what of the following choices does this diagram represent?

This is the same diagram as the one in the previous question, but, just to mix things up a bit, the dark purple rock in the center is now the oldest.  Which of the following choices represents this diagram now?

A geologic structure is depicted in the above map.  What type of structure is it?

Based on the strike and dip symbols drawn on this map, what type of structure is being displayed?

Also, using the same map as the previous question, which of these sedimentary rock units listed is the oldest?

For clarity on this map the sedimentary rock layers are labeled from youngest to oldest as G - L - g - 1 - 0 - 3.  Given this information, which of the following types of structures is correct for this portion of the map?

This is a portion of the Grand Canyon Geologic Map produced by the United States Geologic Survey. It is a combination of a topographic map and a geologic map. Pay particular attention to the contacts of the various rock types (different colors) and the contour lines. Which strike/dip symbol correctly displays the attitude of the rocks in the mapped area? All of the symbols are in the same layer (Ph) that is written in RED to distinguish it from the other strata.

Which of these layers (as indicated by the red arrows) is the youngest?

This is a diagram of a Plunging Syncline. The diagram is part of a block diagram. The diagram is divided into 2 parts, the top represents the map view (view from above) and the bottom part of the diagram is the view from the front of the block. This is the part of the plunging syncline that would be below the surface. (If you were to print the diagram, cut it out, it would be folded along the black line at 90 degrees.) Which of the following is the correct symbol for this structure?