We are learning about what is under the ground this term.
We read a book called Sam and Dave Dig a Hole.
We decided to dig a hole on Putikitiki to see what is under the grass we play on.
|First Ms Jones dug a square with the spade and removed the top layer of grass.|
|We were surprised to find that not far beneath the surface there was fine white sand.|
We wondered if the river had once flowed through Putikitiki gully and left river sand behind.
|This photo shows the thin top layer of topsoil and the white sand underneath.|
|We dug a bit deeper.|
|We laid the layers of soil and sand on a sheet of plastic.|
|The sand seemed to go on far down into the hole.|
|There were grass roots in the top layer. There were small worms amongst the roots.|
|We found a giant earthworm deep in the sand layer.|
|We looked through the soils and sand to see if there were any creatures or even treasure.|
|Here is the profile of the top layer. See the grass roots.|
|See the sand starting to show through the topsoil.|
|We couldn't really dig much deeper with our spade.|
We would need to dig a much wider hole to go deeper.
|Here is the fat earthworm that was deep in the sand.|
|We found a grassgrub beetle in the top layer.|
|We found an old rusty nail. It looked like a worm at first.|
|The sand was wonderfully smooth and easy to make into shapes.|
|Fially we put the layers of sand and earth back in the hole and compressed it with our feet.|
|There was a bit of sand and soil left over after we filled in the hole so we carried it over to a depression on another part of Putikitiki.|
|We dug a second hole on the other side of Putikitiki beside the big fallen log.|
Interestingly, the topsoil went a lot deeper.
|We found broken glass and stones in that hole.|