Wanted: Oscar Obsidian - Auckland Museum
Wanted: Oscar Obsidian - Auckland Museum
Wanted: Oscar Obsidian - Auckland Museum
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Activity<br />
Sheet<br />
1<br />
2<br />
3<br />
4<br />
5<br />
6<br />
7<br />
ACTIVITY SHEET<br />
ROCK STRATA<br />
Look at this diagram of a cliff face. These are layers of sediment deposited by water. The faster the<br />
water, the larger the particle size deposited, the slower the water, the finer the particle deposited.<br />
Conglomerate<br />
Limestone<br />
Mudstone<br />
Greywacke<br />
Lava flow<br />
· Which is the oldest layer?______________________________________________________<br />
· Which is the youngest layer?____________________________________________________<br />
· What evidence could be used to date layer numbers 2 and 3?<br />
· Why are fossils sometimes found in sedimentary rocks?<br />
____________________________________________________________________________<br />
____________________________________________________________________________<br />
· Sedimentary layers are deposited by water.<br />
What events might have happened when layer 3 was deposited?<br />
____________________________________________________________________________<br />
____________________________________________________________________________<br />
· Write what you think happened as each layer was deposited. Start at layer 7.<br />
____________________________________________________________________________<br />
____________________________________________________________________________<br />
____________________________________________________________________________<br />
____________________________________________________________________________<br />
<strong>Auckland</strong> <strong>Museum</strong> 31<br />
Soil<br />
Sandstone