Micro-organisms called foraminifera have tiny coiled shells with chambers, not unlike
the chambering nautilus but much smaller. In modern oceans the coiling direction of
foraminifera shells is correlated to temperature. Using coiling direction from
foraminifera fossils is an example of ________.
A) using the fossil as a paleo-depth indicator because water temperature varies with
depth
B) using the fossil’s coiling direction is a proxy for climate because the surface water
temperature would be highly correlated to surface temperature
C) using isotopes to fingerprint temperature
D) geomagic; the whole idea is preposterous
In deserts of southwestern North America developers often build houses in dry stream
beds and build only minimal subsurface drainage systems to handle a flow of water
comparable to the size of the dry stream channel. Is this a reasonable development
model in the interest of public safety?
A) Yes, although flash floods can occur, using the channel size is a reasonable estimate
of the maximum flood size.
B) No, flash floods can produce high viscosity mudflows that would not be captured by
the drainage system and could flow out over the valley, destroying everything in its
path.
C) No, giant rock avalanches could come down the valley covering houses.
D) Yes, any potential flooding catastrophe would be a 100 year flood event and would