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2013-10-20 18:21|鿴:13940|:0|:С

ֲȺʾͼ

 

ֲȺʾͼ

 

ͣPermianԼ2.92.5ǰһʱʯ֮̿䡣͵ʯDZȽϷģʼľȷȴ顣䲻ȷȿɴꡣΪ֣ĿǰʹַCisuralianGuadalupianLopingianPermianԴԶ˹ı˶ķݡΪһ˵ڵ¹ͬزϲþʻң²Ǻɫɰ֮ʡ

 

 

ڵֲާާΪнϴ仯ľࡢ«ľࡢާ´˥΢֮ԽͺֲɰΪӣ࿪ʼչ

 

ʢռƣҲҪ֣ʯԷ죻̦޺˥ˣҶʼѸٷչж״δʢĿĿ޿Ŀڡ

 

ĩ90%95%ϸԭĿǰвȷ

 

 

ں䡢㲼ںˡɺϲӡȰ뵺ͻ˹̹롢Ĵϼйϲȵбҡˮ

 

ɽ㷺ڳšİ˶ǶĩǿҵĹ˶ĿƵײؿ˶УǿҵĻɽز¡ŷ½Ϊһ塣Ǻйϲİײڶ;һ塢ʡɽ뼰Сҡҵ

 

˹ڱγ30㡫40㣬Եкӡǣ֧ذĴγ30㣻֧븲й½ձɢСͨຣͨĩĺˣʹ󲿷ֺйϡͻ˹̹һͼ䱣ֺ򻷾

 

һͣ6ͣԼʼ2.9ǰ,2.5ǰһڼγɵĵزƶϵ1841Ӣѧɽ·һ׷ʯ϶ĵز㣬Ϊͱ׼棬¶ص㿨εı˶ķΪPermianϵӢPermianԴڶĵϵǸݶԵĵ¹طDyas¹͵زԵطΪ֣²ΪɫɰңƳͳ½ࣩϲΪþʻңþͳࣩ

 

Ҫݻʱڡ޼׵Ҫǹjࡢɺ;ʯɳɷַҪ仯֫Ҷֻʣ˫µķչĩɺɺjࡢҶȫ٣

 

׵ڶͷչһ½׶ΡеӲ·չгͣӲѸٷչһʢжеıڶ·չӾںУ԰ϷǵΪʯ̿ںͶڣ޿ǶСں͵Ʋжؽз֡

 

ֲòƣԽާʯɡާާΪӡɰֲʼò

 

2.5ǰһʱʯ̿ͺ֮䡣͵ʯDZȽϷģʼͽľȷȴ顣䲻ȷȿɴꡣͷͺĿǰձʹַCisuralian,GuadalupianLopingian

 

͵ӢΪPermianԴԶ˹ı˶ķݣԵƴͬС졣ΪΪһ˵ڵ¹ͬزϰǰʯ°Ǻɫʯ֮ʡ

 

е½һ½̹Ŵ½ʱȽϵ͡

 

ʱں콸dzԾ½ާֲ↑ʼ˥ˣާާdzïʱڵһֲ֡½ϵҪܶж↑ʼչҲˡ

 

͵ĺΪ

 

͵ĺΪ衣๲࣬Edestusʯ̿ͳ,ɴ6סHelicoprion(̫)춶ͳưԺࡢʯɺΪʳHelicoprion1937cmɴ1020ףڵʱĺϰ2.2ǰ

 

ݱ

 

򡢹Ź͹ŵϲ½ӡȰ뵺ڶʱǷͳһ½±Ϊ൱͵ģ𽥸ı䡣㷺ıʾһůɺ򣬶ϰ㷺ĺúʾһʪ򡣶ɽúͻɽ㷺ֲʱڣںɽ˶ڡ˶ڶĩǶǿҵ˶ĿƵŵزĵؿ˶аǿҵĻɽ

 

ŷɽúͻɽڡڻɽ㷺ڳš

 

ز¡Դŷ½ںΪһ塣Ǽйϲز۴ڶ;һθӵ塢ʺ͹㷺ǿҵĻɽ뼰Сҵ

 

й½ﷶΧڳִĸԭʳձ硢ɽá

 

͹ŵһͻصŷǶز۴˹Ĵڡһڴڵĺشֱֲγ30㡫40㣬Եк򶫴ӡǡһ֧ذĴ쵽γ30㣻һ֧븲й½빹츴ӵձزͨزͨ˹򻷾ӣdzˮˮȶĵ

 

ĩĺˣʹϴ󲿷ֵںйϡͻ˹̹һͼʼձֺ򻷾

 

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ĩʷصĴ¼Ƶ96%95%ĺ75%½ؼ׵Ҷ桢ЫԼҪɺȺȫʧ½ܵĵȺȺҲˡδʹռ캣3ҪӴ˥ܲʧλ̬࣬ϵͳҲһ׵ĸ£Ϊදƽ˵·ѧձΪһʷӹת۵̱δĺ½ȶ1/6Ҳûʹݻ̲شתۡ

 

ڴԼ2.5ǰĩڵĴǵʷϹģһ

 

ڴԼ2.5ǰĩڵĴǵʷϹģһдԼһĿƼԪﶼˣּԪﵽ90ϡռ캣3꣬ޱȷʢĺ嶯X½Ҳ˾޴仯ֲԼ㶯 ˣλڷչִ̬࣬ϵͳ׸ ¡ձΪԭƺԵһʱڣ½ϲγɷ½ߺdz٣ȫůܱȱһ˹ĽĿʼ

 

ѧΪڶƽ½½ƯصִʱеĴ½ۼһϵĹ½ĵĺ߼٣½ҲСˣ̬ϵͳܵصƻ,ֵܶΪʧȥռصǣdzĴ½ܱ¶ԭں׵лʱͷ˶̼ĺпܼ½ϵĶdzߣƽʹ½⵽֣֮Ҳȱشزдĸлʵҳⳡѵ֤

 

δͻ䡢ɳĮΧ󡢻ɽһϵԭɡ ʯײѧѧΪʯСײ˶ĩڵײﵽһ̶ȣȫһɻԵijĸıѼһЩ֤Ƕֹ۵ӡѧΪⳡɵϵȻ仯ġ

 

ĸı

 

ЩѧΪı仯γⳡѵҪԭΪĩγɵʯʾʱijЩ䣬ڵγЩ޴İɫǽ̫ⷢգһȫ£ʹ½ϺͺϵӦټϺƽ½ͻɽͻΪ֮֡

 

ɷֵĸı

 

ЩѧΪʽȽϻԾĶƲĵදҪȱĶǿΪɷֵĸıġΪĩµĽͻᵼºƽ½úͻᱩ¶棬ͷų̼УеͻԼ٣ͬʱɽȼ˺׵Ŀȼͷż鵼·ЧӦϸƵͷŵĶɱ˴

 

ɽɽͻɽɽɽŲʹϢҲпڱ̫ʹȫ½͡ԣɽҲǶĩ¼ԭ֮һǾֵʱɽұʡ

 

ɳĮŰ

 

͵½ײγӴ̹Ŵ½ԺϵˮҲ޷̽½Ƕ͵ijЩԽԽȣʹɳĮΧԽԽ㣬޷ӦɺĶˡ



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