jinxjungkook

25.07.2019 • 

Geography

Sedimentary rock classification clastic & bioclastic textures comments size clast texture rounding sorting rock name composition large angular clasts - less transport > 2 mm sedimentary breccia gravel angular poor deposition environmei alluvial fan variable alluvial fan, stres beach large rounded clasts - more transport > 2 mm variable conglomerate gravel rounded poor dunes, stream clastic "clean" sandstone - more transport 2-1/16 mm sand quartz quartz sandstone rounded well alluvial fan, strea "dirty" sandstone - less transport arkose 2-1/16 mm sand feldspar, quartz, etc. angular mod-poor floodplain, delta shallow 8 deep ma may split apart along bedding, may or may not "fizz", easily scratched mudstone < 1/16 mm well mud beach > 2mm gravel shells shells poor poorly-cemented shell fragments poor coquine bioclastic shallow-deep mar < 1/16 mm mud shells - well microscopic shells; "earthy chalk chemical & biochemical textures texture composition hardness color rock name comments deposition environmel shallow marine, la calcite caco, h=3 variable limestone will "fizz", can be scratched by a nail dolomite /camg(co3)2 h=3 variable dolomite will not "fizz" unless scratched, can be scratched by a nail nearshore marin chemical silica/sioz h=7 variable chert will not "fizz", not scratched by a nail deep sea halte / naci gypsumn / caso4*2h20 h=2.5 h=2 clear-variable white-variable vertete evaporites evaporitos soft, non-metallic minerals; halite is "salty" playa bio altered organic remains soft brown-black coal light in weight swamp w luumfication exercise 1 sample etter composition (use chart on page 12) rock name texture and other distinctive features & bloclastic textures texture sedimentary rock classification size ciast comments composition rounding sorting rock name normada 21 d . , w odpo biodlastic poor chemical & biochemical textures texture composition hardness color rock name comments depot chemical e h-25 you caso300 wered organic o rock name sample composition (use chart on page texture and other distinctive features letter 12)

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autumnlyons69

16.02.2021

Geography

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Once had the highest deforestation rate in the world and in 2005 still had the largest area of forest removed annually.[1] Since 1970, over 700,000 square kilometers (270,000 sq mi) of the Amazon rainforest have been destroyed. In 2012, the Amazon was approximately 5.4 million square kilometres, which is only 87% of the Amazon's original state.[2]

Rainforests have decreased in size primarily due to deforestation. Despite reductions in the deforestation rate over the last ten years, the Amazon rainforest will be reduced by 40% by 2030 at the current rate.[3] Between May 2000 and August 2006, Brazil lost nearly 150,000 km2 of forest, an area larger than Greece. According to the Living Planet Report 2010, deforestation continues at an alarming rate. But at the CBD 9th Conference, 67 ministers signed up to help achieve zero net deforestation by 2020.

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