0
What else can I help you with?
Why are there few fossils from the precambrian era?
Actually, it isn't really true! We now know (unlike Darwin who would have rejoiced to know what we now know!) that fossils in the PreCambrian are numerous and spread world-wide. But many are very small and not easily recognised or exist in specialised geologically circumstance, often preserved in relatively little-known places. Much PreCambrian rock is igneous, products of vulcanism, and obviously do not preserve fossils. But where suitable conditions prevailed, unusual fossils can be found are a the subject of a great deal of study. Many of the best preserved are where fine volcanic ash settled over the ancient seabed preserving the soft-bodied forms which were around 500-600ma ago. Precambrian fossils may be found at several localities in UK (notably Charnwood Forest in Leicestershire), in Canada, Namibia, Russia, China and especially in Australia.
Name the other fossil animals that have been found in Antarctica?
dinosaurs
Why are more fossils not found?
Asking why there are more animal fossils presupposes that there are more animal fossils than plant fossils. This is not the necessarily case. Plant fossils are actually much more common than animal fossils. If you consider the distribution of biomass in modern ecosystems, it is clear that plants are the dominant kingdom (e.g if you walk into a rainforest, you see hundreds of trees, but few large animals). This distribution is a necessity for any functioning ecosystem because the plants are primary producers (other species need them for survival).Lignite, a low grade coal, is composed entirely of semi-compacted plant fossils. It is so common that it is often burned for use as fuel.This being said, plants also decay faster than animals given the same initial conditions (they do not typically have hard parts like bones), so the percentage of plants that are fossilized should be less than the percentage of macroscopic animals. Since plants so greatly outnumber animals, however, this does not make fossil animals more common.Addendum:It matters too whether one is discussing microfossils or fossils large enough to see or whole fossils or merely a fossilized leaf. See related questions.Plants have softer bodys parts than animals
What is a fossil that can be used as a marker in time called?
Index fossils (also known as guide fossils, indicator fossils or zone fossils) are fossils used to define and identify geologic periods (or faunal stages). They work on the premise that, although different sediments may look different depending on the conditions under which they were laid down, they may include the remains of the same species of fossil. If the species concerned were short-lived (in geological terms, lasting a few hundred thousand years), then it is certain that the sediments in question were deposited within that narrow time period. The shorter the lifespan of a species, the more precisely different sediments can be correlated, and so rapidly evolving types of fossils are particularly valuable. The best index fossils are common, easy-to-identify at species level, and have a broad distribution-otherwise the likelihood of finding and recognizing one in the two sediments is minor. --- Wikipedia
How do scientist know how old fossils are?
they see how deep these rocks are in the earth then they predict ---- Carbon dating is another popular method, by which fossils and other historical artifacts are tested to record levels of a common carbon isotope with a certain half-life.
Why are there few fossils from the precambrian era?
Actually, it isn't really true! We now know (unlike Darwin who would have rejoiced to know what we now know!) that fossils in the PreCambrian are numerous and spread world-wide. But many are very small and not easily recognised or exist in specialised geologically circumstance, often preserved in relatively little-known places. Much PreCambrian rock is igneous, products of vulcanism, and obviously do not preserve fossils. But where suitable conditions prevailed, unusual fossils can be found are a the subject of a great deal of study. Many of the best preserved are where fine volcanic ash settled over the ancient seabed preserving the soft-bodied forms which were around 500-600ma ago. Precambrian fossils may be found at several localities in UK (notably Charnwood Forest in Leicestershire), in Canada, Namibia, Russia, China and especially in Australia.
One reason why there are few Precambrian fossils?
One reason for the lack of Precambrian fossils is the soft-bodied nature of the organisms living during that time, which made preservation difficult. Additionally, geological processes like erosion and tectonic activity have destroyed many of the Precambrian rocks that could have contained fossils. Finally, the Precambrian era was a time of lower oxygen levels, which may have hindered the evolution of complex multicellular life forms that are more likely to fossilize.
How long did the PreCambrian era last?
The Precambrian Era. The name means: "before the Cambrian period." This old, but still common term was originally used to refer to the whole period of earth's history before the formation of the oldest rocks with recognizable fossils in them. In the last few decades, however, geologists have found that there are some hard-to-discern fossils in some Precambrian rocks, so this period is now also known as the Cryptozoic or "obscure life" Eon (from the words "crypt" = "hidden," and "zoon" = "life"). The Precambrian covers almost 90% of the entire history of the Earth. It has been divided into three eras: the Hadean, the Archean and the Proterozoic. Source: Unknown The Precambrian Era comprises all of geologic time prior to 600 million years ago. The Precambrian was originally defined as the era that predated the emergence of life in the Cambrian Period. It is now known, however, that life on Earth began by the early Archean and that fossilized organisms became more and more abundant throughout Precambrian time. The two major subdivisions of the last part of the Precambrian are the Archean (oldest) and the Proterozoic. Rocks younger than 600 Ma are considered part of the Phanerozoic.
Why is Precambrian history more difficult to study than more recent geological history?
Precambrian history is more difficult to study because the rocks from this era have undergone significant alteration and destruction over billions of years, making them harder to interpret. Also, the lack of well-preserved fossils in Precambrian rocks makes it challenging to reconstruct ancient environments and ecosystems accurately. Additionally, the vast timescale of the Precambrian era poses difficulties in accurately dating events and establishing a precise chronology of geological events.
Why is the precambrian time period segmented into very few parts because?
The Precambrian time is segmented into very few parts because it spans an extensive period of Earth's history, roughly 4 billion years, and lacks well-defined boundaries due to limited fossil evidence. The three main subdivisions in the Precambrian are the Hadean, Archean, and Proterozoic eons, based on the geologic processes and events that occurred during each interval.
Why is the Precambrian time period segmented into very few parts?
The Precambrian time period is segmented into very few parts because it covers an immense span of time, approximately 4 billion years. The lack of detailed fossil records and the complexity of geological processes during this time make it difficult to create more subdivisions. Additionally, the period saw major events such as the formation of Earth's crust and the evolution of life, which are hard to categorize into smaller segments.
The longest era with the least information available?
The Precambrian Era is the longest era with the least amount of scientific information available. This is because so few fossils have been discovered.
Why have so few dinosaur found in Antarctica?
So few dinosaur fossils have been found in Antarctica because the entire continent is covered in ice, making it hard to dig and/or search for large fossils.
Why did the Precambrian time period is segmented into very few parts?
The Precambrian time period is segmented into very few parts because it covers an extensive timespan (about 4 billion years) and lacks well-defined boundaries based on significant geological or biological events. The limited knowledge of Earth's early history and the scarcity of preserved rock formations from that time contribute to the challenge of subdividing the Precambrian into more distinct units.
Why have so few dinosaur been found in Antarctica?
So few dinosaur fossils have been found in Antarctica because the entire continent is covered in ice, making it hard to dig and/or search for large fossils.
What is the age of fossils?
Fossils have been found with ages from a few tens of thousands of years old to roughly three billion years old.
How deep are fossils typically found in the ground?
Fossils are typically found buried deep in the ground, ranging from a few feet to hundreds of feet below the surface. The depth at which fossils are found can vary depending on factors such as the age of the fossil and the geological processes that have occurred in that area.
