A Holocene Sedimentary Record from Lake Silvana, Se Brazil: - download pdf or read online

By Saulo Rodrigues-Filho

ISBN-10: 3540662057

ISBN-13: 9783540662051

Mineralogical-sedimentological and geochemical investigations together with pollen information of a 12.7-m-long dated sediment middle from Lake Silvana, SE Brazil, enable the reconstruction of the climatic historical past over the last 10,000 years. The lowermost part (I) displays a rough paleosol-type sediment with ample plant particles and rootlets; pollen exhibits grassland crops. part II represents fine-grained lake sediments; pollen exhibits a savanna-like plants. part III represents a pollen-free, coarse-grained allogenic sediment deposited less than excessive transportation power (increased precipitation). part IV, a greenish series with expanding C content material in the direction of the head, has a pollen spectrum of present-day crops (semideciduous forest). the various sediment sections exhibit a reference to erosional levels within the catchment of the lake, in keeping with mineralogy and geochemistry, that are a reaction to weather improvement.

Show description

Read or Download A Holocene Sedimentary Record from Lake Silvana, Se Brazil: Evidence for Paleoclimatic Changes from Mineral, Trace-Metal, and Pollen Data (Lecture Notes in Earth Sciences) PDF

Similar paleontology books

Craig B. Stanford's Meat-Eating and Human Evolution PDF

While, why, and the way early people started to consume meat are 3 of the main primary unresolved questions within the research of human origins. ahead of 2. five million years in the past the presence and significance of meat within the hominid vitamin is unknown. After stone instruments look within the fossil checklist it sort of feels transparent that meat used to be eaten in expanding amounts, yet no matter if it used to be received via searching or scavenging continues to be a subject of excessive debate.

New PDF release: Dental Perspectives on Human Evolution: State of the Art

The target of the amount is to compile, in a single assortment, the main leading edge dental anthropological examine because it relates to the research of hominid evolution. long ago few many years either the numbers of hominid dental fossils and the sophistication of the concepts used to research them have elevated considerably.

Read e-book online Fossil Crinoids PDF

Crinoids have graced the oceans for greater than 500 million years. one of the most fascinating fossils, crinoids had a key function within the ecology of marine groups via a lot of the fossil checklist, and their is still are in demand rock forming elements of many limestones. this is often the 1st entire quantity to compile their shape and serve as, type, evolutionary background, prevalence, renovation and ecology.

C. Hillaire-Marcel, Anne de Vernal's Proxies in Late Cenozoic Paleoceanography PDF

The current quantity is the 1st in a chain of 2 books devoted to the paleoceanography of the overdue Cenozoic ocean. the necessity for an up to date synthesis on paleoceanographic technology is pressing, because of the large and extremely diverse development made during this area over the last decade. moreover, no accomplished monography nonetheless exists during this area.

Extra info for A Holocene Sedimentary Record from Lake Silvana, Se Brazil: Evidence for Paleoclimatic Changes from Mineral, Trace-Metal, and Pollen Data (Lecture Notes in Earth Sciences)

Sample text

0 . 22 10 28 30 75 143 EG1/ColI. 1 . 5 32 73,5 113 EG 1/Co11. 2 . 15 8 26 14 35 75 EG1/ColI. 4 o - ° . -- not measured A light increase in Fe, Ti and Cr concentrations were also observed in the colluvial unit relative to the B horizon. , 1979). Both the weathering degree and the composition of the parent rock are controlling the metal distribution within the weathering profile EG2, with the possible exception of Hg. The increase in gibbsite contents at the surface, in this case accompanied by elevated Hg concentrations, is a typical 55 picture of highly leached soils.

1020 - ~ - : ~ : : ~ : : : : : ~ m ~ ..... 1050 - o~==mmm 1080 1110 ~ - : : - - - - ~ ;. . . . . ] ................................. I L I ) i -----" i 114o ~ : i ~ ~ i 1230 ~ 1260 ~ ; ~ I ! l~>63pm .................. 2 Summary diagram of mineral stratigraphy, distribution. Paleoenvironmental organic carbon and grain size zones I to IVA as described in the text. 3 Summary diagram of mineral stratigraphy and grain size distribution. Paleoenvironmental zones I to IVA as described in the text.

3 Summary diagram of mineral stratigraphy and grain size distribution. Paleoenvironmental zones I to IVA as described in the text. e, ,~0"" 0 ~r~ns,z, C(org) (,/,) >20pm(%) 15 0 ° ~ - P b (pg/g) 1000 i ~ Cu (pg/g) 100 0 ~i ~ . . . - . . . C r (pglg) 100 0 Ti (%) 1200 ~ 17n ~ ~ 300 ~ = i ~ ~=- , 39o ; "== i ~ --- ~-- 420 ~' ~ ~ ~ P-"--' 480 ~. ~ ! , 550 ~" ~ ~ 1,5 ..... ~ , ~ ............ ~ ---J A oE~0 6T0 " " 700 ," J~ 740 ~' =,, m m m m i 77o; u ~800~ 830 b, 8~o ~ , i ~ i ~ ' ' m B i J 930 " 1140 i ' m m 1230 .

Download PDF sample

A Holocene Sedimentary Record from Lake Silvana, Se Brazil: Evidence for Paleoclimatic Changes from Mineral, Trace-Metal, and Pollen Data (Lecture Notes in Earth Sciences) by Saulo Rodrigues-Filho


by Jeff
4.1

Rated 4.52 of 5 – based on 32 votes