In moderate and cold climates, a tree gains one ring every year, which allows us to estimate its age. Where else we can estimate age in similar fashion?

on the beach, layers of sand and grit
at the bottom of the lake, sedimentation
in the craters, pyroclastic rocks
in the glaciers, layers of clay and sand
A the bottom of some lakes the sed­i­ments stay very well pre­served. Lamina lucida and lamina densa are created during the one year cycle. This fact can be used as lake's age es­ti­ma­tion.

Answers distribution

on the beach, layers of sand and grit
at the bottom of the lake, sedimentation
in the craters, pyroclastic rocks
in the glaciers, layers of clay and sand
answers
flagSpain
0%
68%
10%
21%
19
flagNorway
0%
63%
15%
15%
19
flagSweden
0%
61%
22%
16%
18
flagAustria
9%
58%
9%
22%
31
flagItaly
8%
57%
16%
18%
49
flagthe Netherlands
0%
55%
15%
28%
38
flagFrance
2%
55%
13%
27%
36
flagBelgium
18%
54%
18%
9%
11
flagRepublic of Ireland
0%
53%
19%
26%
26
flagGermany
6%
50%
21%
18%
135
flagthe United States
4%
50%
19%
22%
104
flagCanada
0%
50%
20%
25%
24
flagDenmark
15%
50%
0%
35%
20
flagLithuania
0%
50%
33%
16%
12
flagPoland
5%
49%
18%
25%
10006
flagUnknown
7%
49%
19%
22%
292
flagRussia
5%
45%
24%
21%
37
flagUkraine
8%
45%
22%
17%
35
flagthe United Kingdom
7%
43%
17%
28%
262

Gender

men49%
women55%
on the beach, layers of sand and grit
4%
4%
at the bottom of the lake, sedimentation
49%
55%
in the craters, pyroclastic rocks
17%
18%
in the glaciers, layers of clay and sand
27%
22%

Details

Author: Ninjai
Illustration: Erwin Wodicka
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