What type of material makes up loess deposits?
Answer: Windblown silt
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In the canyonlands of Utah and Arizona, canyon walls often support "hanging gardens" in which plants cling to sandstone cliffs and these hanging gardens are typically along shale beds in the sandstone
These areas are deserts, so what might explain these features? A) The shales form better soils than the sand, so the plants grow there. B) The shales form aquitards in the sandstone acquifer, trapping groundwater along the shale horizons that helps aid plant growth. C) The shales hold the water better than the sandstone, so plants preferentially grow in them. D) The shales are more fractured than the sandstones so the plants have an easier time starting in the shale.
Where were marsupials most abundant during the Cenozoic Era? What has been their fate thus far? What will be an ideal response?
A low infant mortality rate (IMR) suggests
A) better pre- and post-natal care. B) a lower CBR. C) an elderly population. D) a government policy restricting family size. E) a rare population event.
These pillars are remnants of layers, most of which have been stripped away by wind erosion. If this occurred in less than 5 years you might reasonably conclude that
A) the pillars are remnants of volcanic necks.
B) this area recently has become a productive place to produce agriculture.
C) there must have been drought, overgrazing, or some short-term climatic change.
D) this area was originally a lake.