What is Gondwana Flora?

The Indian Gondwana Flora: The most important fossil flora of India is what is known as the Gondwana Flora which covers the period Upper Carboniferous to Jurassic. Indian plant fossils are known before (a few) and after (quite a large number) this period but no flora is as interesting as the Gondwana Flora.

Which were the predominant flora in the Gondwana time?

Lower Gondwana: This division shows predominance of the Glossopteris flora, during Permian period, in which the Talchir, Karkarbari, Barakar, Barren measures Raniganj, Motur, Hingir and Bijori Formations are included. Some elements of this division continues till the Middle Triassic.

What is Gondwana made up of?

Gondwana included most of the land masses in today’s southern hemisphere, including Antarctica, South America, Africa, Madagascar and Australasia, as well as the Arabian Peninsula and the Indian subcontinent, which have now moved entirely into the northern hemisphere.

Was there life on Gondwana?

Life On Gondwana When Gondwana was just a baby supercontinent between 550 and 485 million years ago, it hosted some of the very first complex life forms like trilobites and brachiopods. But since it continued to exist into the Jurassic Period, lots of plant and animal evolution went down there.

Why is Gondwana called Gondwana?

The name “Gondwana” is derived from a tribe in India (Gonds) and “wana” meaning “land of.” Gondwanaland is superficially divided into a western half (Africa and South America) and an eastern half (India, Sri Lanka, Madagascar, Antarctica, and Australia). The Gondwanaland supercontinent.

Why is the lower Gondwana flora called Glossopteris flora?

Observations such as these led the Austrian geologist Eduard Suess to deduce that there had once been a land bridge between these areas. He named this large land mass Gondwanaland (named after the district in India where the plant Glossopteris was found).

What kind of plant was Glossopteris?

Glossopteris, genus of fossilized woody plants known from rocks that have been dated to the Permian and Triassic periods (roughly 300 to 200 million years ago), deposited on the southern supercontinent of Gondwana. Glossopteris occurred in a variety of growth forms.

Why is it called Gondwanaland?

The name Gondwanaland was coined by the Austrian geologist Eduard Suess in reference to Upper Paleozoic and Mesozoic formations in the Gondwana region of central India, which are similar to formations of the same age on Southern Hemisphere continents.

What kind of land was Gondwana?

Gondwana land is a supercontinent that is situated in the southern hemispheres that corresponds to the Indian and Australians in America. The land existed for more than 300 millions years and is it made up of main continental blocks in different parts of the globe.

What did Gondwanaland look like?

During Gondwana’s stint as the southerly supercontinent, the planet was much warmer than it was today — there was no Antarctic ice sheet, and dinosaurs still roamed the Earth. By this time, it was the Jurassic Period, and much of Gondwana was covered with lush rainforest.

What is the climate of Gondwanaland?

Gondwana extended from a point at or near the south pole to near the equator. Across much of Gondwana, the climate was mild. the world was on average considerably warmer than today. Gondwana was then host to a huge variety of flora and fauna for many millions of years.

Why is Gondwana important?

Economically, the Gondwana rocks are the biggest source of COAL deposits in India. Besides this black gold, Gondwana have yielded good quality building stones, clays and iron ores of importance.

Who named Gondwanaland?

Eduard Suess
Gondwana theory The existence of Gondwana was first hypothesized in the mid-1800s by Eduard Suess, a Viennese geologist who dubbed the theoretical continent “Gondwanaland.” Suess was tipped off by similar fern fossils found in South America, India and Africa (the same fossils would later be found in Antarctica).

What are the important features of a Glossopteris?

Glossopteris occurred in a variety of growth forms. Its most common fossil is that of a tongue-shaped leaf with prominent midrib and reticulate venation. Glossopteris leaves are commonly found in thick mats, and thus some authorities speculate that the plants were deciduous.

Why is the lower Gondwana Flora called Glossopteris flora?

What is the organism Glossopteris?

Glossopteris (Ancient Greek: γλώσσα glossa, meaning “tongue”, because the leaves were tongue-shaped, and pteris, Greek for fern or feathery) is the largest and best-known genus of the extinct order of seed ferns known as Glossopteridales (also known as Arberiales or Ottokariales).

When was Gondwanaland formed?

According to plate tectonic evidence, Gondwana was assembled by continental collisions in the Late Precambrian (about 1 billion to 542 million years ago). Gondwana then collided with North America, Europe, and Siberia to form the supercontinent of Pangea.

What did Gondwana look like?

What were the climatic conditions of Gondwana?

Answer: The climate was diverse. There are glacial deposits in some places indicating a cold climate, and in other places there were swamps forming coals. These indicate a warm and swampy climate conditions and hot, dry conditions in some places.

What is a Gondwanan forest?

Gondwanan forests all feature quite a collection of tree-ferns belonging to two predominant families, the Cyatheaceae and the Dicksoniaceae.

What happened to the Devonian flora in Gondwana?

In Gondwana, in contrast, ice and, in Australia, volcanism decimated the Devonian flora to a low-diversity seed fern flora – the pteridophytes were increasingly replaced by the gymnosperms which were to dominate until the Mid-Cretaceous.

How many species of insects are there in Gondwana?

Insects co-evolved with glossopterids across Gondwana and diversified with more than 200 species in 21 orders by the Late Permian, many known from South Africa and Australia. Beetles and cockroaches remained minor elements in this fauna.

What happened to Gondwana during the Carboniferous period?

During the Carboniferous Period, it merged with Euramerica to form a larger supercontinent called Pangaea. Gondwana (and Pangaea) gradually broke up during the Mesozoic Era.