It is possible to calculate the spreading rate of one side of a mid-ocean ridge by dividing distance by time (Distance/Time = Rate). This is called a half-spreading rate. Multiply it by 2 to get the full spreading rate for both sides of the ridge.
How do you calculate spreading rate?
To calculate the rate of the spreading, you need to use the following formula: the distance the sea floor moved divided by the length of time. This is an important concept for people in the earth sciences field.
At what rate is the ridge spreading?
As a general rule, fast ridges have spreading (opening) rates of more than 90 mm/year. Intermediate ridges have a spreading rate of 40–90 mm/year while slow spreading ridges have a rate less than 40 mm/year.
What is the spreading rate in cm yr?
1 cm/yr
spreading ridge axis we can estimate the spreading rate. Spreading Rate = 1 cm/yr Typical spreading rates range from 1 – 10 cm/yr Distance of the 7th normal stripe (green) is about 40 km from the ridge crest. The age is about 4 million years.
How do you calculate spreading rate in paint?
- Spreading Rate (m2/litre) =
- % Volume Solids x 10.
- =
- 71 x 10 = 5.7 m2/litre ✓
- DFT Required.
- 125.
How would you measure and calculate the average half spreading rate?
Half spreading rate = distance between ridge crest and rock of known age ÷ age of rock. Note: Divide answers in km/m.y. by 10 to get cm/yr.
How fast do mid-ocean ridges spread?
100-200 mm/yr
Image from U.S. Geological Survey’s This Dynamic Earth. Fast-spreading mid-ocean ridges move 100-200 mm/yr. The East Pacific Rise is perhaps the best studied fast-spreading mid-ocean ridge. The ridge segment that creates the Nazca and Pacific plates moves up to 5.6 inches (142 mm) each year.
When mid-ocean ridge spreading rates are fast?
The speed of spreading affects the shape of a ridge – slower spreading rates result in steep, irregular topography while faster spreading rates produce much wider profiles and more gentle slopes. Two well-studied mid-ocean ridges within the global system are the Mid-Atlantic Ridge and the East Pacific Rise.
What is the average spreading rate of the Atlantic ocean in cm yr?
around 2 cm/yr
(18km/My) * (0.621mi/km) * (5280ft/mi) * (12in/ft) * (1 My/1,000,000yr) = 0.7in/yr Note: The average spreading rate in the Atlantic is around 2 cm/yr. Student answers however may vary here somewhat depending on the sea floor strip they use.
What is the spreading rate of oceanic ridges per year?
Global spreading rates range from 10 mm (0.4 inch) per year or less up to 160 mm (6.3 inches) per year. Oceanic ridges can be classified as slow (up to 50 mm [about 2 inches] per year, intermediate (up to 90 mm (about 3.5 inches) per year, and fast (up to 160 mm per year).
What is the average spreading rate of paint?
An enamel paint of volume solids 55% spread at 16 sq metres per litre will give a film that is about 35 microns thick (1,000 microns equals one millimetre) and a three coat system will give a total film thickness of about 100 microns.
How to calculate the rate of spreading of the sea floor?
Calculating Sea Floor Spreading. Rate of Spreading = distance the sea floor moved / length of time. or R = d/t. Generally expressed as cm/yr. Source: 1 km = 1000 m. 1 m = 100 cm. so 1 km = 100,000 cm or 10 5 cm. 1.
Where is the Mid Atlantic Ridge located?
The Ridge extends into the South Atlantic Ocean between the South American and African Plates. The ocean ridge rises to between 2 to 3 km above the ocean floor, and has a rift valley at its crest marking the location at which the two plates are moving apart. The Mid Atlantic Ridge, like other ocean ridge systems,…
How fast is the Atlantic Ocean spreading?
The dates revealed that the Atlantic Ocean was opening by seafloor spreading from the Mid Atlantic Ridge at a rate of about 0.02 metres per year. This means that North America and Europe are moving away from each other at about the rate it takes for your fingernails to grow.
How do you calculate half stage spreading rate?
Half spreading rates are based on stage rotations computed from our set of finite reconstruction rotations, and spreading asymmetry estimates are based on determining the percentage of crustal accretion between pairs of adjacent isochrons by dividing the angular distance between them by the half-stage rotation angle.
