Why do you think there are fish fossils found in the Saharan desert?

With increased rain grew waterways that connected to Lake Chad in the south and the Nile River in the north, possibly opening up a passage for these fish to reach the central Sahara in such quantities. Marks found on the fish remains show evidence of other residents: The humans who munched on them.

Why are marine fossils found in the Grand Canyon?

With marine environments creating many of the sedimentary rock layers in the canyon over the past 525 million years, marine fossils are quite common. Species changed over time, but similar fossils can be found in most of the marine-based rocks at Grand Canyon.

What caused the Sahara?

The Green Sahara, also known as the African Humid Period, was caused by the Earth’s constantly changing orbital rotation around its axis, a pattern that repeats itself every 23,000 years, according to Kathleen Johnson, an associate professor of Earth systems at the University of California Irvine.

What kind of fish live in the Sahara desert?

For example, 25 North African animal species have populations both north and south of the Sahara with small refuges within the desert, including catfish (Clarias gariepinus), tilapia (Tilapia zillii), jewel cichlid fish (Hemichromis letourneuxi) and freshwater snails such as the red-rimmed melania (Melanoides …

Why are marine fossils found on top of mountains?

When these animals died from 15 million to 20 million years ago, their carcasses settled to the ocean floor and were embedded in submarine sediments. But since then, the violent upthrusting of the Andean chain has carried the sediments to the tops of mountains.

Was Arizona once an ocean?

Arizona was still covered by a shallow sea during the ensuing Cambrian period of the Paleozoic era. Brachiopods, trilobites and other contemporary marine life of Arizona left behind remains in the western region of the state. Deposition resumed during the Devonian when Arizona was once more submerged by the sea.

Was Egypt a desert when the pyramids were built?

The earliest Egyptian pyramids were built about 4,500 years ago. That’s about a thousand years between the end of a ‘green’ Sahara and the first pyramids. They were built after Sahara had become a desert. Scholars say that by 2500 BCE the Sahara (and Egypt) had become as dry as it is today.

Do lions live in the desert?

Lions are highly adaptable and can live in very dry areas like the Kalahari Desert. Here they get most of their water from their prey and will even drink from plants such as the Tsamma melon.

Can fossils be found in the ocean?

Can fossils be found under the sea (or ocean) floor? – Quora. Yes, all the time. Drill a core of sediment anywhere on the ocean bottom more than a mile or so from a mid-ocean ridge and you’ll bring up fossil plankton called foraminiferans and radiolarians at minimum, and probably many other things too.

Did dinosaurs live in Arizona?

Dinosaur fossils found in Arizona include Ammosaurus, Anchisaurus, Anomoepus, Chindesaurus, Coelophysis, Massospondylus, Navahopus, Revueltosaurus, Rioarribasaurus, Scutellosaurus, Segisaurus, Sonorasaurus, and Syntarsus. Late Cretaceous dinosaurs from the San Juan Basin were some of the last to have lived on Earth.

Why are there no fossils in deserts?

Fossils are everywhere you have sedimentary rock* deserts are actually rather poor at forming fossils compared to many other environments. They are FOUND more often in deserts because there are no plants or soil covering them up and no plant roots to rip them apart for minerals. You do not need deserts just exposed bedrock.

Where are fossils found in the Pierre Shale?

Fossilized Shells. Vast rock and sediment layers remain, along with fossils from creatures that once lived in the sea. The Pierre Shale is a formation deposited by the Western Interior Seaway. Exposures occur in Canada and in many U. S. states, including South Dakota, Colorado, Nebraska, Minnesota, New Mexico and Wyoming.

What do fossil seashells tell us about the Interior Seaway?

Fossilized seashells found in these states reveal clues to the ancient Western Interior Seaway, which once split North America. It covered much of the western interior of the continent between 69 and 80 million years ago.

Why are there so many fossils found in the UK?

Deserts, while hostile, are easier to traverse and cater. Many fossils in the UK are found at the beach where the sea and weather erode the land to expose the treasure, and in mines where people are free to dig to their hearts content. Thanks for contributing an answer to Earth Science Stack Exchange!