Geoscience Reference
In-Depth Information
Table A1.2
Metric to Imperial
length conversion chart.
Table A1.3
Natural sines for conversion of horizontal measurements to
true thickness (see Section 2.5.1).
Metric/SI
Imperial/USA
Degrees
Natural sine
−
2
m
1 inch
2.054
×
10
1
0.017
0.3048 m
1 foot
2
0.035
0.9144 m
1 yard
3
0.052
1.0609
×
10
3
m
1 mile
4
0.07
5
0.087
10
0.174
15
0.259
20
0.342
25
0.422
30
0.5
35
0.574
40
0.643
45
0.707
50
0.766
55
0.82
60
0.866
65
0.906
70
0.94
75
0.966
80
0.985
85
0.996
Geological timescale
An up-to-date geological timescale, information on boundaries,
links to International Stratigraphic Subcommission websites
and a program to compile your own timescale (Timescale
creator) is available from the website of the Subcommission for
Stratigraphic Information. A link is provided from the website
that accompanies this topic (www.wiley.com/go/coe/geology).
