What is the oldest rock in earth?
The oldest rock found on Earth is of extraterrestrial origin, having landed as a meteorite and dating to around 4.56 billion years ago, at the time of the formation of the solar system. For information on the oldest rock of terrestrial origin and the oldest terrestrial material, please see the related questions.
Currently the oldest insitu rock layers of terrestrial origin were discovered by Dr. Jonathan O'Neil and his colleagues, whose work published in September of 2008, revealed rocks as old as 4.28 billion years of age in Northern Quebec, along the Hudson's Bay coast, 40 km south of Inukjuak. This area is known as the Nuvvuagittuq greenstone belt. They were dated by measuring the decay of the element neodymium-142 which was present in the rock. However…
The oldest rock of terrestrial origin (i.e. the whole rock was formed here on Earth at the same time) is the Nuvvuagittuq greenstone in Canada. It has been dates as 4.28 billion years old. The oldest single thing yet found that is known to have been formed on Earth is a zircon crystal which was located in Western Australia within a metamorphic gneiss which was part of the Narryer Gneiss Terrane. It has been dated…
Why are the oldest rocks found on earth younger than the oldest lunar rock that Apollo brought back?
Radioisotope dating of moon rocks showed that the age of the oldest lunar rock was closest to how many years old?
Rocks from the moon have been dated to about 4.5 billion years old. The oldest earth rocks don't date that far back because the earth "reprocesses" rock, and the oldest rocks we know of on earth date back to about 3.7 to 3.8 billion years. The earth and moon formed at approximately the same time, as did the rest of the solar system.
The oldest terrestrial material discovered on Earth to date is a zircon crystal found in Western Australia within a metamorphic gneiss which was part of the Narryer Gneiss Terrane. It has been dated at 4.404 Ga (4.404 billion years old). Please see the related link for more information. For information on the oldest rock on Earth, and the oldest rock mass of terrestrial origin, please see the related question.
Two points here: rocks are solidified material--early Earth was molten. The first rocks appeared after the molten Earth cooled somewhat. Secondly, Earth's rocks are constantly being recycled through the 'rock cycle'. The oldest rocks on Earth have somehow survived those recycling efforts, but no rock found on Earth (other than some meteorites) is as old as the planet.
The early Earth was molten and remained so for at least several hundred million years. The first rock solidified from melt roughly 4.25 billion years ago based on radioactive decay dating methods. Because only rock and certain mineral assemblages can be dated scientifically, the age of the Earth must be older than the oldest terrestrial rock of Earth origin. The oldest rocks that have arrived on Earth from asteroid or meteor impacts have been dated…
The oldest rocks tend to be metamorphic rocks in continental cratons (the centre of continental crustal plates) and may be known as "basement rocks" which are typically very highly metamorphosed rocks such as gneiss. The current oldest known rock (as opposed to oldest mineral within a younger rock)was discovered in Canada which is 4.031 to 3.58 billion years old and is the oldest known intact crustal fragment on Earth and is composed of Hadean tonalite…
Generally the oldest rock is on the bottom because it existed first and then other layers of rock formed on top of it. The one exception to this is if the rock has been pushed to form a dome; then the oldest rock will be the top layer of the dome. Usually, however, the oldest rock is the bottom layer in a section with several rock layers.
This is a very tricky question, unless certain parameters are given. The oldest rock in the universe, most likely was a lithium-ion. The oldest rocks in our solar system are from the Hadean Era and would include parts of the Moon and most meteorites. The oldest rocks on Earth are from the Archean Era and include some granite, diorite, anorthosite, monzonite, and komatite.
.The oldest rock known today is the Igneous rock. .Igneous rock can be any colour..The word "Igneous" is a Greek word that means fire. Igneous rocks are formed by the cooling of molten rock, lava or magma. When magma solidifies in the earth they are intrusive, when lava cools outside the earth it is extrusive.
Is there is any place on the earth where the entire rock record is preserved in perfect on the earth?
No. During the history of Earth, the majority of rock has been been mashed and recycled into Earth's interior several times over by plate tectonics since the Earth formed. However, in 2008, there is a rock formation found in Northern Quebec that is said to be 4.28 billion years old, the oldest rocks in the world. Earth is said to be 4.6 billion years old.