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Geologic Time and the Fossil Record

Teacher: Professor Kevan Murphy
Across
"Sea Lilly" or Echinoderm on a stick
Late Cretaceous huge carnivore. "no Applause"
Lizard hipped order of dinosaurs
The age of chaulk
The earliest appearance of abundant marine life.
Period of extensive coal deposits
Stratigraphic correlation based on fossil assemblages
Massive colonial reef builders possessing "tabulae"
Radioactive particle that consists of 2 protons and two neutrons
Longest division of the geologic time scale
Marine snails "stomach foot"
Dinosaurs, Birds Pterosaurs and Crocodilians
The age of fish
All modern reptiles
Down
Cornucopia shaped extinct coral
Tetrapod class that posses two holes in the skull
Horned dinosaurs
marine arthropod with a cephalon, thorax and pygidium
Marine invertebrate class with five fold symmetry
The first bird "to date"
Half life of 5730 years
Armoured "tank like"dinosaur
Electron sized radioactive partical
Long necked Mesozoic giants
Half life of 4.6 billion years
Phylum porifera
"Sea scorpions" of the Silurian
Extinct cephalopod related to squid
Time for 50 % of a parent isotope to be converted to a daughter product
Mollusc with two shells
Eras are divided into these
Unconformity in the sedimentary sequence