GEO GIRL Courses

Europa's Core, Mantle, and Water Shell - What We Know and How We Know It

Explore Europa's interior structure, formation, and evidence for a liquid ocean through gravity science, geology, and magnetic field data. Learn about ongoing research and future missions.

• YouTube
• 21 minutes
• On-Demand
• Free Video

Life in the Cambrian and Ordovician - GEO GIRL

Explore the fascinating evolution of early Paleozoic life, from Cambrian burrowers to Ordovician predators, and discover key events shaping Earth's biodiversity 542-444 million years ago.

• YouTube
• 27 minutes
• On-Demand
• Free Video

Anaerobe to Aerobe - How Oxygen Changed Life on Earth Forever

Explore Earth's early life, oxygen's impact on metabolism, and the Great Oxidation Event. Learn how oxygen shaped evolution, caused mass extinctions, and ultimately enabled complex life forms.

• YouTube
• 25 minutes
• On-Demand
• Free Video

Cambrian Explosion - More Like Precambrian Explosion and Cambrian Skeletonization

Explores the Cambrian Explosion, challenging its name and timing. Discusses Ediacaran fauna, early animal evolution, mass extinctions, and factors contributing to increased diversity and complexity in Pre- and Early Cambrian life.

• YouTube
• 29 minutes
• On-Demand
• Free Video

Neogene Life and Human Evolution from Early Apes to Australopithecus to Homo

Explore Neogene life and human evolution, from early apes to Australopithecus and Homo. Learn about key evolutionary events, environmental changes, and the development of human traits like bipedalism and tool use.

• YouTube
• 23 minutes
• On-Demand
• Free Video

When Life Moved to Land and the Disastrous Consequences

Explore the evolutionary journey of life from sea to land, its climatic impacts, and the resulting mass extinctions. Learn about key transitions in Earth's history and their far-reaching consequences.

• YouTube
• 24 minutes
• On-Demand
• Free Video

Metamorphism of Pure vs Impure Carbonates - Marbles vs Calc-Silicates

Explore the metamorphism of carbonates, from pure marbles to complex calc-silicates. Learn about mineral transitions, formation sequences, and the influence of pressure, temperature, and CO2 on metamorphic processes.

• YouTube
• 22 minutes
• On-Demand
• Free Video

Metamorphism of Basalt and Gabbro - Metabasite Mineral Assemblages

Explore mineral assemblage transitions in metamorphosed basalt and gabbro across various pressure-temperature conditions, from greenschist to eclogite facies, with detailed explanations of key minerals and textures.

• YouTube
• 32 minutes
• On-Demand
• Free Video

Early Cenozoic Life - Megalodon Roamed, Mammals Go Back to Sea, Huge Birds Hunt Horses

Explore the Early Cenozoic: megalodon sharks, walking whales, giant birds, and the rise of mammals. Discover how climate change and evolving grasslands shaped Earth's ecosystems and animal diversity.

• YouTube
• 21 minutes
• On-Demand
• Free Video

Paleocene-Eocene Thermal Maximum to Eocene-Oligocene Cooling - GEO GIRL

Explore Earth's dramatic climate shifts from the Paleocene-Eocene Thermal Maximum to the Eocene-Oligocene cooling, examining their causes, effects on life, and lasting impact on our planet's environment.

• YouTube
• 21 minutes
• On-Demand
• Free Video

Evolution of Photosynthesis - Were Anoxygenic or Oxygenic Phototrophs First?

Explore the evolution of photosynthesis, from early anoxygenic phototrophs to oxygen-producing cyanobacteria, and how this process transformed Earth's atmosphere and life forms over billions of years.

• YouTube
• 23 minutes
• On-Demand
• Free Video

How to Identify Metamorphic Rocks in Thin Section and Hand Sample - GEO GIRL

Learn to identify metamorphic rocks in hand samples and thin sections. Explore marble, quartzite, phyllite, schist, amphibolite, eclogite, gneiss, serpentinite, slate, and soapstone. Gain practical skills in rock identification and microscopy.

• YouTube
• 37 minutes
• On-Demand
• Free Video

The Ultimate Guide to Sedimentary Structures - Sed Strat - GEO GIRL

Comprehensive exploration of sedimentary structures, including laminations, cross-bedding, ripples, and more. Covers formation processes, depositional environments, and geological significance of various structures.

• YouTube
• 29 minutes
• On-Demand
• Free Video

Chemical Sedimentary Rock Textures - Cement, Replacement, Veins, Oolites

Explore crystalline textures in sedimentary rocks, including cement, replacement, veins, and oolites. Learn terminology, formation processes, and how to determine relative ages of chemical precipitates in rocks.

• YouTube
• 22 minutes
• On-Demand
• Free Video

Fabric, Porosity, & Permeability of Detrital Sediment - Gravel, Sand, Shale, & Limestone

Explore sedimentary rock fabrics, focusing on apposition fabrics in gravel, sand, shale, and limestone. Learn about porosity, permeability, and factors affecting sediment properties in various depositional environments.

• YouTube
• 21 minutes
• On-Demand
• Free Video