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The periods of highest 14C production as measured from tree rings coincide with the periods of highest cooling during the past 1200 years. Credit: Max-Planck-Institut für Aeronomie Katlenburg-Lindau.{{fairuse}}

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QuizEdit







  

1

Complete the text:

The 14
C
produced by

neutrons in the reaction 16O(n,3He)14C in the

depends on oxygen composing 28 % of the

; i.e. 25-28 % more 14
C
is likely to be produced because fast neutrons are much more plentiful in the stratosphere.

2

The two million year Quaternary period is the time of recognizable?

3

Yes or No, Radiocarbon dating is a geochronology and archaeology technique that benefits from radiocarbon capture in the atmosphere and spallation creation of radiocarbon below the atmosphere especially and perhaps in the atmosphere as well.

Yes
No

4

Geochronology is the science of applying dates in the past to?

5

Excess 14C in Cariaco Basin sediments indicates a slowing in thermohaline?

6

Complete the text:

Match up the geological time unit with the title:
Holocene - A
Gelasian - B
Paleogene - C
Triassic - D
Devonian - E
Archean - F
Precambrian - G
period of the Mesozoic

.
supereon

.
age

.
eon

.
epoch

.
period of the Paleozoic

period

.

7

Orbitally forced cyclicity includes?

Jupiter-Venus conjunctions
chemical and physical proxies from sedimentary rock sequences
palaeoclimatic studies
marine Cenozoic sequences
meteorite impacts from the asteroid belt
spectral analysis of the magnetic susceptibility (MS) record

8

The GSSP section near El Kef contains?

one main feature that allows for a direct correlation of this marine section with continental sections
the base of the Danian Stage
the base GSSP for the Paleogene
the base GSSP for the Tertiary
the base GSSP for the Paleocene
the Ir anomaly at the base of the Boundary Clay
the base GSSP for the Cenozoic

9

Which of the following is out of reverse geochronological order?

Pleistocene
Holocene
Pliocene
Miocene
Oligocene
Eocene

10

What phenomena may be associated with K/Pg boundary?

clay in the Geulhemmergroeve tunnels near Geulhem, The Netherlands
the Badlands near Drumheller, Alberta
the cliffs at Stevns
an extensive osmium layer
traces of Fe-Ni alloys
Trinidad Lake State Park, Colorado, USA

11

True or False, The first suggestion that appreciable 14
C
might be produced in situ in polar ice was made by Fireman and Norris, who studied 14
C
in CO2 extracted from both accumulation and ablation samples. In some ablation samples they observed 14
C
activities between four and six times higher than those expected due to trapped atmospheric CO2.

TRUE
FALSE

12

The Holocene starts at ~11,700 b2k and extends to the?

13

Which geological phenomena are associated with the Subboreal?

period around 850-760 BC
characterized by an increase in solar activity
a sharp increase of Δ 14C
characterized by a decrease in solar activity
preceded by the Subatlantic
solar forcing of climate change

14

The ancient history period dates from around 8,000 to 3,000?

15

Complete the text:

The Pre-boreal period marks the transition from the

climate of the Late-glacial to the

climate of the

time.

16

The Chalcolithic is often referred to as the Copper?

17

Which geochemical phenomena are associated with the Younger Dryas?

during the Last Glacial Termination
an abrupt return to interglacial conditions
an abrupt return to glacial-like conditions
summer (1.May to 30.September) temperature dropped 5-6°C during less than two centuries
transition to a warmer, interglacial climate
indicated by changes in Neogloboquadrina pachyderma


HypothesesEdit

  1. Tephra layers may be the best geochronometer.

See alsoEdit

External linksEdit