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Microlophus albemarlensis
Galapagos lava lizard (Microlophus albemarlensis). These lizards are native to South America. There are about twenty recognized species, and six of them are endemic to the Galápagos Islands.
Monocline
A monocline is a fold with a subhorizontal flank passing into a high angle flank. It is usually related to the activity of a tectonic lineament, like a thrust.
Lycaenops
The dentition of this Permian gorgonopsian from South Africa shows features, such as elongated canines, interpreted as indicative of a carnivorous mode of life. The skull (about 20 cm in size) is on display at the Field Museum of Natural History, Chicago.
Rt 139 GreenRiverFm
SEDIMENTARY - CLASTIC: Shale of the Green River Formation, Rt.139 near Douglas Pass --- Mud becomes hardened to form shale. Organic material gives the darker gray color to some of the layers; this oil shale is a mostly untapped energy resource.
Candelabra-cactus
Candelabra Cactus. The flowers of this plant provide food for a species of Galapagos finches.
Load structures
When sediment is still unconsolidated, it can deform under sudden solicitation (e.g., seismic shocks or load by additional sediment). Water expelled from intergranular pores can generate distinctive soft sediment deformation structures, known as ball-and-pillow structures or load structures, typically found at the contact between sandstone and mudstone beds.
Opuntia
Opuntia Cactus: Opuntia is a genus that includes 200 species of cacti, all with broad, flat leaves. Of those species, only six grow in the Galapagos: Opuntia echios, Opuntia galapageia, Opuntia helleri, Opuntia insularis, Opuntia saxicola, Opuntia megasperma.
Channel
In sedimentology, a channel is a lensoidal architectural element with a concave erosional base.
Rt82 GypsumFolding
SEDIMENTARY - CHEMICAL: Pennsylvanian Eagle Valley evaporites, Rt.82 south of Glenwood Springs --- Gypsum is assumed to have formed in a hot, arid climate by evaporation of sea water in a closed basin causing the precipitation of calcium sulfate. After burial, this soft rock easily flows forming the chevron fold seen in this picture.
Lava
Lava tunnel on Isabela Island. As lava flows, it can form lava tunnels up to several kilometers long. The surface of the lava cools rapidly and forms a crust that protects the lava that continues to flow beneath. If the lava under the hardened crust eventually drains out, it can leave a hollow tunnel behind.
Epsilon cross-stratification
As meandering rivers move on a floodplain they can generate distinctive cross-stratified deposits related to lateral migration of point bars. The cross-set at the center of the photo is several meters thick.