In the future, when an object emerges in a different time, that moment is referred to as a crowning. An impacted crowning is when said object materializes within another object, fusing with it. An aerial crowning occurs when it is a certain level above solid ground. I suppose we can also have aquatic crownings, for that matter...
This brings up a number of questions:
Would materials simply fuse together, or would the forced merging of two materials set of some type of atomic explosion?
Air itself is matter - Then why does the "fusing" effect not take place with a solid material and air?
In order to mitigate the fusing phenomenon, all crowning events, by their nature, are preceded by what is known as "displacement." Meaning, that all existing matter is either vaporized, or simply "ceases to be" and is replaced by the emerging object. This either occurs by design (i.e. a pre-singularity is created in order to clear/swallow-up a certain area, so that it can be "made ready" for the object to have a clean entry, or it simply occurs via the laws of nature. Please explain the workings of either approach.
As the problem of undesirable terrain/conditions is inevitable when doing any type of time traveling, does it not become a necessity to send a probe to do a quick check regarding conditions prior to sending the actual payload? What are some considerations of the "scouting" aspect of time-travel? i.e. you don't want to travel in time, only to discover that you end up in a pool of lava, or if you follow the John Titor model, you don't want to end up on an Earth which has so far deviated from the Earth that you know, and the atmosphere on it is completely different to the one you're used to.