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In planetary geology, the term "ejecta" includes debris ejected during the formation of an impact crater. When an object massive enough hits another object with enough force, it creates a shockwave that spreads out from the impact. The object breaks and excavates into the ground and rock, at the same time spraying material known as impact ejecta.
Less than ten thousand years old, and with a diameter of 100 m (330 ft) or more. The EID lists fewer than ten such craters, and the largest in the last 100,000 years (100 ka) is the 4.5 km (2.8 mi) Rio Cuarto crater in Argentina. [2]
A megaproject is an extremely large-scale construction and investment project. [1] A more general definition is "Megaprojects are temporary endeavours (i.e. projects) characterised by: large investment commitment, vast complexity (especially in organisational terms), and long-lasting impact on the economy, the environment, and society". [2]
In the summer of 1998, Hollywood offered up not one, but two blockbuster films about asteroids hurtling towards Earth. Released on May 8 of that year, Deep Impact, directed by Mimi Leder, told a ...
Suevite from the Nördlinger Ries impact crater (type locality) Portal to the town hall's stairway made of suevite in Nördlingen, Germany. Suevite is a rock consisting partly of melted material, typically forming a breccia containing glass and crystal or lithic fragments, formed during an impact event.
It's an African native with large, pear-shaped leaves in a perfect medium green. “The older the tree and the more light it gets, the larger and more eye-catching the leaves become,” Hancock ...
When large objects impact terrestrial planets such as the Earth, there can be significant physical and biospheric consequences, as the impacting body is usually traveling at several kilometres a second (a minimum of 11.2 km/s (7.0 mi/s) for an Earth impacting body [2]), though atmospheres mitigate many surface impacts through atmospheric entry.
Traffic congestion, deaths and injuries from car accidents, air pollution, and global warming are unintended consequences of the invention and large scale adoption of the automobile. Hospital infections are the unexpected side-effect of antibiotic resistance , and even human population growth leading to environmental degradation is the side ...