Entropolia is
different from Earth in many ways making the geologic landscape
intriguing. Entropolia has less mass which decreases the gravity.
It is closer to Loomy than Earth is to the Sun making it more
of a dry desert climate with 50% water.
Entropolia is
different from Earth in many ways making the geologic landscape
intriguing. Entropolia has less mass which decreases the gravity.
It is closer to Loomy than Earth is to the Sun making it more
of a dry desert climate with 50% water.
The planet of Entropolia is composed of an inner core, outer core and mantle. The inner core is composed of solid iron. The outer core is composed of molten metallic. The mantle is composed of a solid rocky layer.
Located within the mantle layer is a layer that is similar to the asthenosphere of Earth. It is a hot, weak zone that is capable of gradual flow. Situated above the asthenosphere is a zone similar to the lithosphere on Earth. This zone includes the crust and upper most mantle.
The lithosphere is floating on top of the asthenosphere in pieces called plates. There are 15 tectonic plates dividing up the crust of Entropolia that are slowly moving. The motion is driven by a thermal engine, the result of unequal distribution of heat within Entropolia.
As hot material gradually moves up from deep within the planet and spreads laterally, the plates are set in motion. This movement of Entropolia's lithosphere plates generate earthquakes, volcanic activity, and the deformation of large masses of rock into mountains.
Entropolia has two land masses which are surrounded
by ocean. The two continents are named Barchan and Scoria. They
both have jungles from the ocean edge to one mile inland where
a mountain range circles each continent. Average elevations in
jungles are 25-500 feet above sea level. 
The
jungle ends at the base of the mountain range that circles each
continent with elevations ranging from 1,500-46,121 feet above
sea level. On the inland side of the mountain range the land is
characterized as desert with elevations ranging from 0-200 feet
above sea level. Entropolia has less gravity pushing down on the
planet, allowing the maximum mountain height on Entropolia to
be greater than Earth. The highest mountain is Hefty which is
located along the Tarn mountain range on the continent of Barchan
with an elevation of 46,121 feet. The Tarn mountain range circles
the continent. The mountain range that circles the continent of
Scoria is Calderan with elevations ranging from 1,500-25,000 feet
above sea level.
Entropolia has volcanic activity along the
Calderan and Tarn mountain ranges, desert regions and ocean basins.
There are both shield and composite volcanoes. Both types of volcanoes
are increasing the height of both mountain ranges and creating
mountains in the desert regions.
The inactive composite volcanoes on the planet have steep-walled calderas. Calderas are craters that exceed 1 km. The calderas on Entropolia average 28 km across. The calderas are important for the presence of fresh water on the planet.
The active shield volcanoes provide for spreading of the continental crust. They typically have a slope of only a few degrees. These volcanoes have slow moving lava flows.
The active composite volcanoes on the planet are responsible for altering the climate. The explosive volcanoes emit huge quantities of fine-grained debris into the atmosphere. The most explosive on the planet is Daget that is 810 meters high and erupts every 3 years. The violence of the explosion ejects material that stays in the atmosphere for months, even years.
Entropolia is covered
by 50% water. There is an ocean and twelve fresh water lakes.
The lakes are found in inactive volcano calderas. In the desert
regions there are 4 shallow basins that are dry at times during
the year. When it rains, runoff accumulates in the basins. Later,
water evaporates leaving salt deposits. The largest lake on Barchan
is Serenity with a length of 150 km and a depth of 5 km.
Entropolia's ocean covers 49% of the planet's surface or 130 Million square km. Its average depth is 4,000 m; the deepest point is Mariana Trench which is more than 11,000 m below sea level. The deep-ocean trenches represent only a small portion of the area of the ocean floor. However, they have significant geologic features. Trenches are the sites where moving crustal plates plunge back into the mantle. In addition to the earthquakes created as one plate descends beneath another, volcanic activity is also associated with trench regions.
The ocean is subdivided into the Azul Ocean and Ripple Ocean. The Azul Ocean makes-up two-thirds of the total surface covered by water. The Ripple Ocean makes-up the remaining one-third and lies between the planet's two land masses.
The ocean can be divided into three classifications:
the continental margins, the deep ocean basins, and the mid-ocean
ridges. The continental margins are from the shoreline to the
continental slopes. 
This region is a
gently sloping submerged surface extending approximately 40 km
from the shoreline. Since it lies over a continental-type crust,
it is clearly a flooded extension of the continents.
The deep-ocean basin is located between the continental margin and oceanic ridge. Here we find remarkably flat regions known as abyssal plains, steep-sided volcanic peaks called seamounts and deep-ocean trenches. The mid-ocean ridges is where seafloor spreading occurs. Ocean ridge systems are characterized by an elevated position, extensive faulting and numerous volcanic structures. Ocean ridges are found in both oceans on Entropolia. The mid-Azul Ridge forms a continuous mountain range that extends for about 55,000 km that circles the planet.
Except for a few areas such as near the crests of mid-ocean ridges, the ocean floor is mantled with sediment. Part of this material has been deposited by turbidity currents (oceanic rivers moving from continental shelf to deep-ocean floor) and the rest has slowly settled to the bottom from above. The thickness of the sediment varies from the Java Trench in the Azul Ocean with 9 km to the mid-ocean ridges which have little to none. Although deposits of sand-sized particles are found on the deep ocean floor, mud is the most common sediment covering Entropolia's ocean floors. The composition of the sediment depends on depth and distance from continents and local phenomena such as submarine volcanoes.
Terrigenous sediment consists primarily of mineral grains that were weathered from continental rocks and transported to the ocean. The sand-sized particles settle near shore and the very small particles are carried by ocean currents taking years to settle to the ocean floor.
Biogenous sediment consists of shells and skeletons of marine animals and plants. This debris is produced mostly by microscopic organisms living in the Loomylit waters near the ocean's surface. The most common biogenous sediments on Entropolia are known as calcareous oozes which have the consistency of mud.
Hydrogenous sediment consists of minerals that crystallize directly from seawater through various chemical reactions. Also found on Entropolia's ocean floor are manganese nodes. These rounded blackish lumps are composed of a complex mixture of minerals. These three types of sediment are found in small amounts throughout the ocean floor.
Photo credits: planets = NASA, core = Grolier's