How is an alluvial fan formed?
A) A stream erodes down through older terraces and entrenched meanders.
B) Sediment is deposited by debris flows and streams that decrease in velocity along the mountain front.
C) A landslide blocks the stream, causing sediment to accumulate upstream.
D) A dam increases the speed of currents below the dam.
B) Sediment is deposited by debris flows and streams that decrease in velocity along the mountain front.
You might also like to view...
The valence shell is the
A. shell of electrons in an atom that is the least reactive. B. last partially filled orbital in an atom. C. outermost shell of electrons in an atom. D. shell of electrons in element V (atomic no. = 23). E. same as the orbital configuration.
Cumulus clouds that appear above isolated mountain peaks are often the result of:
a. katabatic winds. b. mountain winds. c. fall winds. d. Santa Ana winds. e. valley breezes.
The Kurgans, identified as the first Proto-Indo-European speakers by archaeologist Marija Gimbutas
A) conquered much of East Asia several thousand years ago. B) were a Germanic tribe that invaded England. C) were herders from the steppes of today's Russia and Kazakhstan. D) preserved Basque in present-day Spain. E) were the earliest speakers of Sino-Caucasian, which they diffused through conquest.
On each continent, large "core areas" of Precambrian rocks, called ________, dominate the surface
Fill in the blank(s) with correct word