tldrdailynews.com logo
Tag

Radiometric Dating

All articles tagged with #radiometric dating

Direct Dating Links 3.5-Billion-Year-Old Life Signs to Their Rock
science5 days ago

Direct Dating Links 3.5-Billion-Year-Old Life Signs to Their Rock

A study on a carbon-rich chert from India's Singhbhum Craton directly ties biosignatures to a precise age: uranium–lead dating of zircon crystals embedded in the rock centers the deposit at about 3.497 billion years ago, with four of eight zircons yielding consistent ages around 3.5 Ga. Complementary Raman spectroscopy and carbon-isotope analysis show a laminated carbon layer with isotopic signatures indicative of ancient biology, supporting the interpretation of a microbial mat preserved in a volcanically active, iron- and silica-rich early Earth environment. The findings provide robust, embedded dating for ancient life and are published in PNAS 2026.

via ScienceAlert|
#carbonaceous-chert#early-earth-life#microbial-mats
Meteorite Unveils Ancient Water Clues on Mars
science1 year ago

Meteorite Unveils Ancient Water Clues on Mars

A new analysis of the Lafayette meteorite, which originated from Mars, reveals that liquid water was present on the planet 742 million years ago. This discovery, made possible through advanced radiometric dating techniques, suggests that water on Mars may have resulted from the melting of subsurface ice due to magmatic activity. The findings not only provide insights into Mars' geological past but also have broader implications for understanding the presence of water in the Solar System.

via ScienceAlert|
#geology#mars#meteorite
"Welsh Rocks Reveal Earth's Earliest Creatures"
paleontology2 years ago

"Welsh Rocks Reveal Earth's Earliest Creatures"

Fossils discovered in Welsh rocks in the 1970s have been dated to 564 million years ago, revealing details about some of Earth's earliest creatures. The disc-shaped invertebrates, found in Carmarthenshire, likely lived in shallow waters along the coast of volcanic islands during the Ediacaran period. These ancient organisms, too primitive to be described as animals, are unlike any other forms of life and are considered the oldest in Wales. The breakthrough in dating the fossils was due to the work of a Pembrokeshire-born PhD student, Tony Clarke, who has been working on radiometric dating at Curtin University in Perth, Western Australia.

via BBC.com|
#ancient-organisms#ediacaran-period#fossils
New Lunar Crystals Confirm Moon's Age: 40 Million Years Older Than Believed
space-science2 years ago

New Lunar Crystals Confirm Moon's Age: 40 Million Years Older Than Believed

Analysis of zircon nanocrystals collected during the Apollo 17 mission suggests that the Moon is approximately 40 million years older than previously estimated, with an age of 4.46 billion years. These crystals serve as an anchor for the lunar chronology and were formed after the Moon's molten surface cooled. By using atom probe tomography and radiometric dating, scientists were able to measure the composition and age of the crystals, providing insights into the Moon's formation.

via IFLScience|
#age#apollo-missions#lunar-crystals
New Study Reveals Moon's Surprising Age: 40 Million Years Older Than Previously Believed
science2 years ago

New Study Reveals Moon's Surprising Age: 40 Million Years Older Than Previously Believed

The moon is believed to be 40 million years older than previously thought, according to a study using lunar crystals brought back from the Apollo 17 mission in 1972. The crystals, which formed after the giant impact that created the moon, were analyzed using radiometric dating, pushing back the moon's age to at least 4.46 billion years old. Understanding the moon's age is important as it plays a crucial role in stabilizing Earth's rotational axis and influencing tides. The findings provide valuable insights into the formation and evolution of our natural system.

via Daily Mail|
#giant-impact-theory#lunar-crystals#lunar-formation
Ancient Side-Necked Turtle Unearthed in UK, Dating Back 127 Million Years
paleontology3 years ago

Ancient Side-Necked Turtle Unearthed in UK, Dating Back 127 Million Years

The first side-necked turtle fossil has been discovered in the UK on the Isle of Wight, dating back 127 million years. Using radiometric dating and CT scanning techniques, researchers from the University of Portsmouth confirmed its age and examined its internal structure. The fossil, found by an amateur collector, represents the earliest known instance of a side-necked turtle in the UK and provides valuable insights into the ancient fauna of the region.

via SciTechDaily|
#fossil#isle-of-wight#paleontology
Exploring Mammal Evolution through China's Yanliao Biota.
science3 years ago

Exploring Mammal Evolution through China's Yanliao Biota.

The Yanliao Biota, a collection of fossils from northeastern China dating back to the Middle to Late Jurassic, has been used to study the evolution of vertebrates. Researchers used volcanic ash layers to date the fossils with greater precision and found that the biota is between 164 and 157 million years old. The study identified the root of mammalian evolution back into the Late Triassic, spawning diversification in the Jurassic, supporting the long-fuse model. The researchers stress that there are likely more ghost lineages of hypothesized mammal ancestors to be found as researchers continue to explore the wonders of life on Earth in the deep past.

via Phys.org|
#china#fossils#mammal-evolution
Unraveling the Age of Earth: A Scientific Perspective.
science3 years ago

Unraveling the Age of Earth: A Scientific Perspective.

Earth's age is estimated to be around 4.54 billion years old. Radiometric dating is used to determine the age of rocks by measuring the ratio of radioactive elements to stable elements. Uranium-lead dating is one type of radiometric dating, and the mineral zircon is commonly used for this purpose. Scientists have found minerals on Earth that date as far back as 4.4 billion years, and rocks from other parts of the solar system have also been dated to around 4.5 billion years ago. The transition from primordial dust cloud to planet Earth happened over millions of years, making it difficult to pinpoint a specific year for the planet's formation.

via Livescience.com|
#earth#half-life#radiometric-dating