11. Write and post a paragraph below describing: a). the debris flow and landslide conditions in the area you have chosen and how that corresponds to what you see--in other words, is the area you chose very hilly and steep (making landslides likely)? Do you find any signs on the ground, such as bent trees or leaning fences? Feel free to include screen captures. b). zoom out to look at Marin as a whole. About how much of the county falls under "Mostly Landslide"? How much under "Few Landslides," and what populated areas of Marin are examples of the "Few Landslides?"

Metamorphism is the solid-state change of a rock in response to a modification to its environment.From the list below, select four environmental changes that are most responsible for causing metamorphism.

Define what is meant by the erosion, transportation and deposition of sediment.

Identify the boring log legend that the Kleinfelder company uses, in your Reader. Notice that there are different types of samplers, each identified with a different symbol. The SPT sampler is identified with a rectangle with an X in the middle. Draw the symbol used for the "Standard California Sampler" (this is a sampler that is a bit different than the SPT sampler).

Volcanic gases are A. incorporated into growing crystals in a magma. B. not harmful, because most are less dense than air. C. more abundant in mafic lavas than in felsic lavas. D. released by magma as it rises and the pressure decreases.

Note the faint drawings on these outcrops. These are called petroglyphs and have been etched into the dark film covering the sandstone. This film is called "rock varnish" and is predominantly clay and some iron and manganese oxides. The petroglyphs were pecked out hundreds of years ago by prehistoric inhabitants of the Tucson Mountains. Make a sketch of one of the petroglyphs:What do you think this petroglyph signifies?

If you started out with a basalt protolith and subjected the rock to high-grade metamorphism,which minerals would you likely produce?

You have to review the design of a cantilever concrete retaining wall designed for a clear height of 18 ft and soils as shown in the figure. Ignore the effect of passive earth pressure at the toe of retaining wall. Please check the design and provide yourrecommendation for the following situation:

Rocks deform in response to applied stress. Deformation is usually either brittle or ductile.Earthquakes occur when rocks deform in a brittle fashion. Select the two images below that represent brittle deformation.

4. At the front face of a retaining wall, the toe of the wall is 3 metres below ground level. The horizontal component of the active thrust on the wall is 226 kN per lineal metre, and the vertical component of the load on the base is 423 kN per lineal metre.The soil is sandy and has a density of 1.75 Mg/m³, o'crit =27°. Find the passive resistance against the front of the wall. Calculate the ultimate limit states (ULS) for sliding (angle of internal friction is 20°).