Quarternary period

Question 1

quarternary period

Answer 1

most recent, 2.58 million yrs, pleistocene and holocene

Question 2

characteristics of quartnernary

Answer 2

made modern tectonics/ocean circulation/global climate systems, polar ice cap movement

Question 3

requirements for ideal sediment reconstruction

Answer 3

continuous sediment, high temporal resolution (lots of sediment), reliable age model, preserved proxies

Question 4

what rock is youngest

Answer 4

top

Question 5

what is hiatus

Answer 5

break in sediment

Question 6

climate during quarternary

Answer 6

50 glacial (cold) and interglacial (warm) periods in N hem, solar/orbital forcing main climate mechanisms

Question 7

response times for solar/orbital forcing

Answer 7

atmosphere/land/ocean takes hrs-months, glaciers/deep ocean takes years

Question 8

pleistocene

Answer 8

orbital forcing cycles changed

Question 9

interglacial

Answer 9

odd MIS numbers (marine isotope numbers), last one was 130-115ka, less CO2, high sea levels/temp

Question 10

glacial

Answer 10

even MIS, last glacial 115-19ka, last glacial maximum 33-19ka, less CO2, low sea levels

Question 11

MIS higher amplitudes

Answer 11

1-11

Question 12

holocene MIS

Answer 12

1

Question 13

last glacial-interglacial cycle

Answer 13

130ka-today, warming from MIS 2-1, transition called late glacial

Question 14

interglacial characteristics

Answer 14

warm/wet, humid, vegetation, less ice, high sea levels, more weathering, rainforest in tropics

Question 15

glacial characteristics

Answer 15

cold/dry, less vegetation, more ice, low sea level, lots of loess (wind sediment), savannah in tropics