The Passionate Collector - George Rae Fossils
11th September - 20th December 2003
AMMONITE –Ammonites had a spiral
shell similar to the closely related Nautilus. They are also related
to squid and octopus. Their name comes from the Egyptian god Ammon (Amun)
who is sometimes associated with ram horns similar in shape to ammonites.
They appeared around 400 million years ago and evolved very quickly,
making them useful for dating rocks. Ammonites became extinct at the
same time as the dinosaurs, 65 million years ago.
BELEMNITE – An extinct marine animal with a solid bullet-shaped
skeleton and a chambered internal shell at the open end. They are related
to squid, cuttlefish and octopus. Named after the Greek storm god Belemnos,
they used to be called thunderbolts. These animals became extinct at
the same time as the dinosaurs, 65 million years ago.
- 570-510 million years ago.
CARBONIFEROUS - 363-290 million years
- 146-65 million years ago.
- 409-363 million years ago.
- A period within the Palaeogene part of the Tertiary.
GRAPTOLITE – “writing on rock”. An extinct group of marine organisms. They appeared in the Cambrian period (c.520 Ma) and became extinct between the Permian and Triassic periods, 248 million years ago. They are found all over the world and evolved very quickly – this means they are important for dating rock sequences.
HARRIER JUMP JET – One of the world’s most original aircraft; its most important feature is its ability to take off and land vertically. It was the first fixed wing aircraft to introduce this capability into service.
IAPETUS OCEAN – Sometimes called the “Proto-Atlantic Ocean”, this ancient body of water disappeared around 400 million years ago when the European and American continents started to close in. The join where Scotland and England converged is not far from Hadrian’s Wall. The rocks in Scotland are very similar to those in North America.
- 208-146 million years ago
- 510-439 million years ago
- 290-245 million years ago.
- 4,560-570 million years ago.
PULSE DOPPLER RADAR (PD RADAR) – A
very useful radar system which can determine the speed, distance and angle
of a target. It is most valuable when in a situation with many small
moving targets. PD radar also has the capacity to concentrate only
on moving targets.
- The last two million years.
SPECIES - The lowest group of creatures
in the tree of life. The hierarchy is as follows: Kingdom; Phylum;
Class; Order; Family; Genus; Species. The species is the group
of creatures which share a great number of similarities and share a common
name with other groups.
- 65-0.85 million years ago.