Rudists
Rudists are a group of box-, tube-, or ring-shaped marine heterodont bivalves that arose during the Late Jurassic and became so diverse during the Cretaceous that they were major reef-building organisms in the Tethys Ocean.
Shell description
The Late Jurassic forms were elongate, with both valves being similarly shaped, often pipe or stake-shaped, while the reef-building forms of the Cretaceous had one valve that became a flat lid, with the other valve becoming an inverted spike-like cone. The size of these conical forms ranged widely from just a few centimeters to well over a meter in length.
Their "classic" morphology consisted of a lower, roughly conical valve that was attached to the seafloor or to neighboring rudists, and a smaller upper valve that served as a kind of lid for the organism. The small upper valve could take a variety of interesting forms, including: a simple flat lid, a low cone, a spiral, and even a star-shaped form (Johnson, 2002).
Fossil range and extinction
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Young Forever
by: Ready SetWe'll be young forever
We'll be young forever
We can be like prisoners
And we can be alone
We can make a mess like no one knows
And risk it on our own
Spendin' the money that we don't have
Cause we don't care no
Livin' like kings with broken strings
And bass down to the floor
Livin' with our headphones up
We got sound and that's enough
Nobody can touch us
And we run and we run and we run
Hey hey we'll be young forever
We'll be young forever till forever stops
We're singing
Hey hey we'll be on forever
Tonight we'll last forever till our bodies drop
We can run through the night
Write our name up in the sky
Got the music on our side
Ain't nobody gonna catch us singin'
Hey hey we'll be young forever
On the run forever and we'll never stop
(Don't stop, don't stop now)
Look at us look at us we'll take the whole world by surprise
Million dollar- mind set in place you can see it in our eyes
Everything here is ours to take, so come and take your side
Livin' like kings with broken strings
And the bass so sympathized
We can turn the speakers up
Cause we got sound and that's enough
Nobody can touch us
And we run and we run and we run
Hey hey we'll be young forever
We'll be young forever till forever stops
We're singing
Hey hey we'll be on forever
Tonight we'll run forever till our bodies drop
We can run through the night
Write our name up in the sky
Got the music on our side
Ain't no body gonna catch us singin'
Hey hey we'll be young forever
On the world forever and we'll never stop
(Don't stop, don't stop now)
Ohoah
Ohoah
We're gonna rule the world tonight
Ohoah
Ohoah
The beat of the Drums Keep us alive
(Tonight will last forever till our bodies drop)
Hey hey we'll be young forever
We'll be young forever till forever stops
We're singing
Hey hey we'll be young forever
Tonight we'll run forever till our bodies drop
We can run through the night
Write our name up in the sky
We can run run run away
(Nobody gonna catch us)
Ain't no body gonna catch us singin'
Hey hey we'll be young forever
On the run forever and we'll never stop
(Don't stop, don't stop now)
We can run run run away