Cambrian Stage 2

（重定向自Tommotian）

Key events in the Cambrian

view • discuss •

-550 —

–

-540 —

–

-530 —

–

-520 —

–

-510 —

–

-500 —

–

-490 —

–

N
e
o
p
r
o
t
e
r
o
z
o
i
c

P
a
l
e
o
z
o
i
c

Ediacaran

C
a
m
b
r
i
a
n

Ordovician

T
e
r
r
e
n
e
u
v
i
a
n

S
e
r
i
e
s

2

S
e
r
i
e
s

3

F
u
r
o
n
g
i
a
n

Fortunian

"Stage 2"

"Stage 3"

"Stage 4"

"Stage 5"

Drumian

Guzhangian

Paibian

Jiangshanian

"Stage 10"

* * * * * * * * * * * *
* * * * * * * * * * * * * * * * * * * * * * * * *

Baykonur
glaciation

* * * * * * * * * * * *
* * * * * * * * * * * * * * * * * * * * * * * * *

←

Orsten Fauna

←

Burgess Shale

←

Kaili biota

←

Archaeocyatha extinction

←

Emu Bay Shale

←

Sirius Passet biota

←

Chengjiang biota

←

First Trilobites

←

SSF diversification, first brachiopods & archaeocyatha

←

First halkieriids, mollusсs, hyoliths SSF

←

Treptichnus pedum trace
Large negative peak δ 13C_carb excursion

←

First Cloudina & Namacalathus mineral tubular fossils

Stratigraphic scale of the ICS subdivisions and Precambrian/Cambrian boundary.

Stage 2 of the Cambrian is the unnamed upper stage of the Terreneuvian series. It lies on top of the Fortunian and below Stage 3 of the Cambrian. It is commonly referred to as the Tommotian, after the Cambrian stratigraphy of Siberia. Both the upper and lower boundary have not been clearly defined yet by the International Commission on Stratigraphy. Proposals for the lower boundary are the appearance of Small Shelly Fossils, an archaeocyathid species or the mollusc Watsonella crosbyi around ~529 million years ago. The proposed upper boundary might be the first appearance of trilobites around ~521 million years ago.

词汇	Tommotian
分类	英语词汇英语翻译词典
释义	Tommotian 原声例句 7天搞定托福单词 Tommotian and Burgess Shale formations give clues about Precambrian evolution. 早间，Tommotian和伯吉斯页岩化石群为前寒武纪进化提供了线索。英语百科 Cambrian Stage 2 （重定向自Tommotian） Key events in the Cambrian view • discuss • -550 — – -540 — – -530 — – -520 — – -510 — – -500 — – -490 — – N e o p r o t e r o z o i c P a l e o z o i c Ediacaran C a m b r i a n Ordovician T e r r e n e u v i a n S e r i e s 2 S e r i e s 3 F u r o n g i a n Fortunian "Stage 2" "Stage 3" "Stage 4" "Stage 5" Drumian Guzhangian Paibian Jiangshanian "Stage 10" * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * Baykonur glaciation Baykonur glaciation * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ← Orsten Fauna ← Burgess Shale ← Kaili biota ← Archaeocyatha extinction ← Emu Bay Shale ← Sirius Passet biota ← Chengjiang biota ← First Trilobites ← SSF diversification, first brachiopods & archaeocyatha ← First halkieriids, mollusсs, hyoliths SSF ← Treptichnus pedum trace Large negative peak δ 13C_carb excursion ← First Cloudina & Namacalathus mineral tubular fossils Stratigraphic scale of the ICS subdivisions and Precambrian/Cambrian boundary. Stage 2 of the Cambrian is the unnamed upper stage of the Terreneuvian series. It lies on top of the Fortunian and below Stage 3 of the Cambrian. It is commonly referred to as the Tommotian, after the Cambrian stratigraphy of Siberia. Both the upper and lower boundary have not been clearly defined yet by the International Commission on Stratigraphy. Proposals for the lower boundary are the appearance of Small Shelly Fossils, an archaeocyathid species or the mollusc Watsonella crosbyi around ~529 million years ago. The proposed upper boundary might be the first appearance of trilobites around ~521 million years ago.
随便看	jirsa Jirwān Jiryan jiryis JIS Jisaixin JIS ALGOL JISC JIS code JISE Jisei JIS FORTRAN Jish jisheng shenqi pills Jisheng Shenqi Wan Jishou jisi jism JIS Ordering Jisr jisr ash shughur Jisr ash Shughūr jissom jis standard sieve Jist 浪漫情书文案歌曲是什么意思情感散文一分钟朗诵词语是什么意思好情感语录壁纸是什么意思月底情感文案句子图片伤感是什么意思情感散文诗的创作方法是什么意思初雪的文案情感短句子简短是什么意思男声翻唱的情书是什么意思天涯情感视频文案素材下载是什么意思关于dzb情书的信息是什么意思情感语录经典手绘图片是什么意思情感挽回女友句子是什么意思七言律诗表达相思情感吗是什么意思情感文案手机拍摄软件是什么意思王羲之的作品表达什么情感是什么意思快手经典情感语录大全是什么意思如何挽救破碎的婚姻？怎么样挽救爱情姐弟恋如何相处才能更好？情人怎么相处才能长久情人怎么相处才能长久情人怎么相处才能长久？怎么处对象才能更好情人怎么相处才能长久？姐弟恋如何相处才能更好异地恋如何保持？情人怎么相处才能长久情人之间的关系怎么维持才能长久情人之间的关系怎么维持才能长久？一起看看情人之间的关系怎么维持才能长久？有什么方法怎样维护持久？情人之间的关系怎么维持才能长久情人之间的关系怎么维持才能长久？有什么技巧情人之间闹矛盾了怎么解决夫妻之间产生矛盾如何解决？情人之间闹矛盾了怎么解决情人之间闹矛盾了怎么解决？情人之间闹矛盾了怎么解决情人之间闹矛盾了怎么解决？一起看看结构性行为改变疗法结构性运用不能结构方程结构方程模型结构构图论结构级差结构观察结构途径结构－定向教学心理学原理结果结果参照分数结果知识绘人测验绘境说绘画心理学王姓宝宝取名大全:从传统到创新的命名之道杨姓和魏姓宝宝取名大全:寓意美好的名字推荐如何为宝宝取一个好名字?李姓和何姓取名大全推荐如何为宝宝取一个好名字?朱姓和永姓取名大全推荐如何为宝宝取一个好名字?罗姓和陈姓取名大全推荐徐姓和苏姓宝宝取名大全:寓意美好的名字推荐如何为宝宝取一个好名字?黄姓和龚姓取名大全推荐杨姓和田姓宝宝取名大全:寓意美好的名字推荐如何为宝宝取一个好名字?专家支招姓詹姓取名大全如何为宝宝取一个好名字?肖姓和慈姓取名大全推荐如何为宝宝取一个好名字?朱姓和徐姓取名大全推荐如何为宝宝取一个好名字?汪姓和沈姓取名大全推荐如何为宝宝取一个好名字?黄姓和吕姓取名大全推荐如何为女孩取一个好名字? 如何为宝贝取一个好名字?葛姓取名大全助你一臂之力