A10.2.2 is an oblique view of t bedding planes. The the lower-left corner of the

Question

A10.2.2 is an oblique view of t bedding planes. The the lower-left corner of the photograph. a small outcrop of fine-grained layered rock that contains fomils. The layers probably layers are inclined, and the sense of inclination can be determined by noticing the water in is t. Using the water line as a guide, carefully draw a strike line near the top of one of the flat layers using the black-and- white image for your drawing. (Make sure your teacher can see the strike line you draw.) Remember that a strike line is ntal line on the inclined surface and that the waterline is aso a horizontal line on that surface ine the photograph carefully and imagine a ball rolling down the inclined surtace. Now draw what you infer to be a dip vector extending from the strike line using the black-andwhite image for your draving S. Identify which end of the strike line points toward the Right-Hand-Rule reference strike. Label that end of the strike line with "RHR Refer to Fig 10.2 for help visualizing the RHR reference strike 4. Let's assume that the direction do these beds dip? ou cannot directly measure the dip angle in this view, but you can estimate the dip angle within perhaps 10° or so. About what is the dip angle of these beds D REFLECT& DISCUSS We have been looking at a small outcrop with inclined beds in Fig, A10.2.2 I. What is the strike of a horizontal surface? 2. What is the dip angle of a vertical surface? 3. The dip direction is a general compass direction like north or southwest. What is the dip direction of a vertical surface or does it even have a dip direction? White glint off a film of ice on water Figure A10.22 285

Explanation / Answer

D

1) strike of horizontal surface: strike, fault or other planer surface is a line that represents the intersection of that feature with the horizontal surface.

2) when the earth's total magnetic field makes an angle with the horizontal direction is known as the angle of dip.

3) of vertical surface, there is no angle of dip direction, since it is at 90 degree, itself called vertical.

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