basic soil forming process

15:52

2:34

21:17

20:15

15:50

6:01

2:44

2:05

3:33

3:11

32:01

7:31

32:36

7:42

4:34

1:15

21:28

14:53

3:03

1:36

20:08

4:30

11:08

9:28

00:57

25:59

5:31

6:10

2:54

5:38

29:54

00:49

6:11

8:17

30:49

2:04

3:49

16:32

3:39

2:10

12:02

2:39

20:32

43:34

8:55

12:58

29:41

11:57

3:26

16:06

00:57

33:46

12:45

13:51

41:02

28:34

8:17

1:25:31

14:19

20:03