The thermogravimetric analysis during the hydrotreatment in dynamic regime of organic matter for Tarfayas oil shale different layers and layer M Timahdit was object this study, several results obtained allowed us to describe energetic non-estimable value that it is extract or use as fuel. By processing curves TG, DTG=f(Tmax) their surfaces we were able show concentration mineral climate sedimen...

The Upper Cretaceous (Turonian) Akrabou Formation at Asfla in south east Morocco is a marine carbonate succession well-known for its exceptionally preserved, often three-dimensional vertebrate fossils. It perhaps best known diverse ichthyological assemblage comprising both cartilaginous and bony fishes, notably teleosts pycnodonts. However, holostean fishes (Holostei), particularly gars (Gingly...

Diatoms are one of the most important eukaryotic primary producers in lower ecosystem; understanding their evolutionary history is therefore also important. Throughout Cenozoic hydrosphere, diatoms have flourished. However, as a result progressive diagenesis and dissolution opaline silica that forms frustules, early evolution during Cretaceous unclear, so fossil record incomplete. Largely becau...