GL4024_Lecture_3_Controls_on_preservation

Which of these depositional environments is a typical obrution-type setting?

• lagoon

• cave fissure

• amber

• continental slope

Which of these depositional settings is a classic stagnation-type setting?

• river

• continental slope

• shoreline

• deep lake

In the Cambrian, we see a cluster of Konservat Lagerstatten in which type of setting?

• terrestrial

• lagoon

• continental shelf

• continental slope and deep basin

Why are jaws and setae the most robust parts of polychaetes?

• they are mineralized

• they are sclerotized

• they decay quickly

• none of the above

What is the oldest evidence of DNA in fossils?

• 6000 years old

• 60,000 years old

• 600,000 years old

• 6 Ma

What is tissue autolysis?

• self-decay

• microbial decay

• enzymatic control of pH during life

• mineralization

What are the most decay-prone tissues in the body?

• blood and bone marrow

• nervous tissue

• muscles

• ligaments

Which of these metabolic pathways yields the highest amount of energy to microbes?

• Nitrate reduction

• Sulfate reduction

• methanogenesis

• Fe reduction

What happens to basal vertebrates and chordates during decay?

• Tissues decay randomly

• The least diagnostic characters decay first

• The most diagnostic characters decay first

• No tissues decay

Tissue biochemistry....

• has no effect on the mode of preservation of soft tissues

• affects the quality of preservation of soft tissues

• affects the chemistry of preserved soft tissues

• affects the size of preserved soft tissues