'Banded iron formations' presentation slideshows

PREHISTORIC STORY ROOM ? ? ???

PREHISTORIC STORY ROOM ? ? ???. ???????????????????????? 1 ???????? 2011 ? 8 ?????????????????????????????. ????????????????????????????????????????????????????. ???????????????????????????????????????????????????????????????????????????????????????????????????????????????????????.

1.82k views • 156 slides

Home

999 views • 79 slides

Chapter 9

Chapter 9 . The Proterozoic: Dawn of a More Modern World. Proterozoic Eon. 2.5 billion years to 542 million years ago Comprises 42% of Earth history Divided into three eras: Paleoproterozoic Era (2.5 - 1.6 by ago) Mesoproterozoic Era (1.6 to 1.0 by ago)

1.72k views • 78 slides

The Archean and Proterozoic

The Archean and Proterozoic. Part 2. A Quick Review. The Big Bang Red Shift Accretion of Solar System Earth Moon. A Quick Overview. Atmosphere and Oceans Continental and Oceanic Crusts Protocontinents of the Archean Assembly of major continental pieces in the Proterozoic

1.26k views • 75 slides

EVOLUTION OF LIFE

EVOLUTION OF LIFE. HOW DID LIFE EVOLVE AND WHY?. Some major episodes in the history of life. organism with visible nuclei: any organism with one or more cells that have visible nuclei and organelles.

947 views • 45 slides

Examples of Ore Deposits

Examples of Ore Deposits. Magmatic Cu-Ni-PGE-Cr Hydrothermal --- veins --- metasomatic skarns *** magmatic , meteoric, or sea water origin Low-Temperature --- Banded Iron Formations --- Residual weathering/ supergene enrichment. Komatiitic basalt. Peridotite. Gabbro.

671 views • 44 slides

Snowball Earth!

1.58k views • 42 slides

The Hadean

The Hadean. The Rock Record. The rock record is meagre . Oldest rocks are 4.0 billion years old from the Slave Province in Canada Oldest zircons (derived from sedimentary precursors) are 4.2 billion years old.

531 views • 30 slides

VIZUALIZING EARTH HISTORY

VIZUALIZING EARTH HISTORY. By Loren E. Babcock. Chapter 9. Proterozoic World. Evolution of the Cratons and Proterozoic Supercontinents About 2.5 billion years ago the Earth entered a new phase of its history, which is why this period was chosen as beginning of the Proterozoic Eon .

608 views • 30 slides

Chasing Precambrian Paleo-redox

PHANEROZOIC. NEOPROTEROZOIC. MESOPROTEROZOIC. Chasing Precambrian Paleo-redox. PROTEROZOIC. PALEOPROTEROZOIC. Yanan Shen Harvard University. ARCHEAN. HADEAN. OUTLINE. I: Sulfate Reduction and S-isotopic Fractionation II: Archean Ocean Chemistryand Atmosphere

473 views • 27 slides

Oxides - Oxyhydroxides

Oxides - Oxyhydroxides. FeOOH minerals ? Goethite or Limonite (FeOOH) ? important alteration products of weathering Fe-bearing minerals Hematite (Fe 2 O 3 ) ? primary iron oxide in Banded Iron Formations

484 views • 26 slides

Planets & Life PHYS 214

358 views • 25 slides

Life on Earth Topic 4: Urey and Miller

Life on Earth Topic 4: Urey and Miller . Part of the Evolution of Australian Biota Module Biology in Focus, Preliminary Course Glenda Childrawi and Stephanie Hollis. DOT POINT.

470 views • 23 slides

241 views • 23 slides

Early evolution of life on Earth

Early evolution of life on Earth. Wachtershauser. Miller and Urey experiment. Early catabolism. Evolution of cell types. Primitive Metabolism. Early catabolism must make use of chemical disequilibria Later, photosynthetic energetics may have evolved

793 views • 21 slides

Precambrian

476 views • 20 slides

2.11k views • 15 slides

Geologic evidence for major environmental change

Geologic evidence for major environmental change. Geologic evidence for major environmental change. Banded Iron Formations. Geologic evidence for major environmental change. Banded Iron Formations.

224 views • 14 slides

Ozone

Ozone. Relationship between changes in oxygen concentration and the development of the ozone layer. 3500mya Cyanobacteria (photosynthetic) began producing molecular oxygen. Cyanobacteria. = Oxygen.

257 views • 11 slides

547 views • 11 slides