This Special Paper Presents A Collection Of 19 Papers Contributed To A Joint Field Forum Organized By The Geological Society Of America And The Geological Society Of South Africa In July 2004 In The Barberton Greenstone Belt And The Vredefort Dome, South Africa. The Papers Cover A Wide Variety Of Themes, Including Archean And Proterozoic Crust Formation And Geodynamics (with An Appraisal Of Evidence Of Archean Subduction Processes); The Significance Of Impacts In The Evolution Of The Early Earth's Crust; Traces Of Early Life In Archean Environments Of Australia And South Africa And Related Studies Of Depositional Environments; And Processes Affecting The Giant Witwatersrand Gold Deposit.--publisher's Website. The Record Of Impact Processes On The Early Earth: A Review Of The First 2.5 Billion Years / Christian Koeberl -- Large-scale Impacts And The Evolution Of The Earth's Crust: The Early Years / Richard A.f. Grieve, Mark J. Cintala, And Ann M. Therriault -- Archean Spherule Layers In The Barberton Greenstone Belt, South Africa: A Discussion Of Problems Related To The Impact Interpretation / Axel Hofmann, Wolf Uwe Reimold, And Christian Koeberl -- Diagenetic Alteration Of Impact Spherules In The Neoarchean Monteville Layer, South Africa / Issaku Kohl, Bruce M. Simonson, And Melissa Berke -- Relicts Of Earth's Earliest Crust: U-pb, Lu-hf, And Morphological Characteristics Of>3.7 Ga Detrital Zircon Of The Western Canadian Shield / R.p. Hartlaub [and Others] -- Precise U-pb Zircon Id-tims Ages Provide An Alternative Interpretation To Early Ion Microprobe Ages And New Insights Into Archean Crustal Processes, Northern Labrador / Thomas E. Krogh And Sandra L. Kamo -- The 3.466 Ga Kitty's Gap Chert, An Early Archean Microbial Ecosystem / Frances Westall [and Others]. Microfacies And Origin Of Some Archean Cherts (pilbara, Australia) / Beate Orberger [and Others] -- Contrasting Source Components Of Clastic Metasedimentary Rocks In The Lowermost Formations Of The Barberton Greenstone Belt / Annika Dziggel [and Others] -- The Significance Of Subduction-related Accretionary Complexes In Early Earth Processes / John W. Shervais -- A Reevaluation Of Archean Intracratonic Terrane Boundaries On The Kaapvaal Craton, South Africa: Collisional Suture Zones? / Carl R. Anhaeusser -- Syntectonic Emplacement And Deformation Of The Heerenveen Batholith: Conjectures On The Structural Setting Of The 3.1 Ga Granite Magmatism In The Barberton Granite-greenstone Terrain, South Africa / Richard W. Belcher And Alexander F.m. Kisters -- Shrimp Zircon Age Constraints On Mesoarchean Crustal Development In The Vredefort Dome, Central Kaapvaal. Craton, South Africa / Richard A. Armstrong [and Others] -- Physical Volcanology And Compositions Of The Basaltic Lavas In The Archean Nzuse Group, White Mfolozi Inlier, South Africa / Allan H. Wilson And Claire E. Grant -- The Structural-metamorphic Evolution Of The Northern Margin Of The Zimbabwe Craton And The Adjacent Zambezi Belt In Northeastern Zimbabwe / Paul H.g.m. Dirks And Hielke A. Jelsma -- The Limpopo Belt: A Result Of Archean To Proterozoic, Turkic-type Orogenesis? / J.m. Barton Jr., R. Klemd, And A. Zeh -- Origin Of Hydrothermal Fluids And Gold Mineralization Associated With The Ventersdorp Contact Reef, Witwatersrand Basin, South Africa: Constraints From S, O, And H Isotopes / B. Zhao [and Others] -- The Nature Of Hydrocarbons And Related Fluids In The Witwatersrand Basin, South Africa: Their Role In Metal Redistribution / G.r. Drennan And L.j. Robb -- Conditions Of Gold Remobilization In The Ventersdorp Contact Reef, Witwatersrand Basin, South Africa / Rudy H. Boer And Wolf Uwe Reimold. Edited By Wolf Uwe Reimold, Roger L. Gibson. Includes Bibliographical References And Index.