Calymmian - Wikipedia
The Calymmian Period (from Ancient Greek: κάλυμμα, romanized: kálymma, meaning "cover") is the first geologic period in the Mesoproterozoic Era and lasted from 1600 Mya to 1400 Mya (million years ago). Instead of being based on stratigraphy, these dates are defined chronometrically.
盖层纪 - 维基百科，自由的百科全书
盖层纪（Calymmian，符号MP 1 ）是地质时代中的一个纪，开始于同位素年龄1600±0百万年(Ma)，结束于1400±0Ma。 盖层纪期间 蓝藻 、 绿藻 发育，出现大型宏观 藻类 。
Plant Evolution & Paleobotany - Calymmian
The Calymmian is the first period of the Mesoproterozoic, occuring after the (Statherian) Paleoproterozoic, and before the Ectasian Period. What happened during this time? A time of continent building, where the Earth's crust thickens due to …
盖层纪 - 百度百科
盖层纪 （Calymmian，符号MP 1 ）是 地质时代 中的一个 纪 ，开始于同位素年龄1600±0百万年(Ma)，结束于1400±0Ma。 盖层纪 期间 蓝藻 、 褐藻 发育，出现大型宏观 藻类 。
Mesoproterozoic Era - Science Facts
There are 3 major periods of Mesoproterozoic Era – Calymmian, Ectasian, and Stenian. Each of these periods has individual features and contributed to the development of the era. The name of this period denotes the features of this period.
Calymmian - Simple English Wikipedia, the free encyclopedia
The Calymmian is the first geological period in the Mesoproterozoic. It began 1.6 billion years ago and ended at 1.4 billion years ago. In the period new land was formed. The supercontinent Columbia broke up during the Calymmian about 1.5 billion years ago.
The Calymmian - dinosaurfact.net
Known as the first period of the Mesoproterozoic Era this period lasted from 1.6 billion to 1.4 billion years ago and contributed to develop several features of the era. The name of the period indicates that it stands for that time when development and expansion of …
Calymmian - Wikiwand
The Calymmian Period (from Ancient Greek: κάλυμμα, romanized: kálymma, meaning "cover") is the first geologic period in the Mesoproterozoic Era and lasted from 1600 Mya to 1400 Mya (million years ago).
About: Calymmian - DBpedia Association
The Calymmian Period (from Ancient Greek: κάλυμμα, romanized: kálymma, meaning "cover") is the first geologic period in the Mesoproterozoic Era and lasted from 1600 Mya to 1400 Mya (million years ago).
GeoWhen Database - Calymmian
Period: Ectasian ( 1400 - 1200 ) General Stage: Riphean ( 1400 - 800 ) General Substage: Burzyan ( 1400 - 1375) This page was automatically generated from the GeoWhen database (version 1.1.0). Please read the introduction regarding the …