Trace Fossils and Body Fossils

Question 1

Intertidal Zones:

Answer 1

• Highest rate of supply
• Sediment + reworking (waves and currents)
• Behaviours: mobile - feeding/dwelling/escaping
• Trace fossils preservation = vertical
• Would have to be mobile
• Things have to be mobile: skolithos, ophiomorpha, Scolicia (can live down to shelf), Glossifungites/Thalassinoides (anywhere substrate is stiff or semi-consolidated)

Question 2

Slope:

Answer 2

• Sedimentation rate dropping (low)
• Sediment disturbance rate is rare = fine grained sediment overall = excellent preservation of trace fossils, both vertical and horizontal
• Zoophycos - spending a lot of time because it is worth investing because of low sedimentation and sediment disturbance

Question 3

Shelf:

Answer 3

• Sediment supply is ok
• Lower Sediment disturbance
• Vertical and horizontal traces
• Diversity will increase because of preservation + highest diversity of traces
• Planolites/paleophycos

Question 4

Basin:

Answer 4

• Not quite 0 sediment accumulation
• Disturbance is very unlikely to happen
• Very fine grained
• Great preservation
• Increases rate of farming
• Palaeodictyon (farmers) - investing a lot of time

Question 5

Hard Substrates

Answer 5

• Trypanites (rock)

- Teredo (wood)

Question 6

Stiff substrates:

Answer 6

Glossifungites (Bivalve)

- Thalassinoides (shrimp)

Question 7

Soft Substrates

Answer 7

Ophiomorpha (shrimp)
Skolithos (worms) 
Pistchnys (stingrays)
Scolicia (echinoderm) 
Zoophycos (no idea = a "worm")
Planoliteles/palaoephycos - horizontal burrows 
Palaeodictyon (farmers = hexagonal)